I just wanted to introduce myself and explain what's brought me here.
7 weeks ago I ordered two cabs from Marc Serio at Dr. Bass. Here are some pics:
The top one is a 1080, loaded with a Eminence BP102, an Alpha 8 MR, and a QSL tweeter of some kind. The bottom one is a 112 loaded with an Delta 12LFA, and a Selenium tweeter.
Considering Marc's well-earned reputation for untimely delivery, I took a calculated risk ordering some used/demo cabs, since they were already built, I figured I had a pretty good chance of receiving them. At the time I also asked if he would re-wire them to bi-amp with my GK head.
He became almost impossible to reach after I paid him, to the point when I could only get him to answer the phone if I always called from a different number. The process was excruciating. First, the 3-way x-over had to be "custom-made" to work with the GK. Then he began working less because his gall-bladder had recently been removed. Then a family member comitted suicide, and lastly, as I was in the process of filing a dispute with my credit card company, he decided that the 10" in the 1080 was sounding a "little tired" and he wanted to upgrade it to the BP102. This driver was rated at a lower wattage than the spec one, so we talked about upgrading the 112 to a 500W driver to get a little more headroom. I thought this was just more stalling tactics, but miraculously, he shipped them 4 days later, with not only upgraded drivers, but he claims to have replaced the mid in the 1080 and the diaphram in the tweeter on it too.
Over the years Marc's cabs have received excellent reviews, so I figured that if I recieved them at all, they would likely rock.
More fool I.
Upon opening them, them 1080 had a miserable distortion at any level, and the 112 didn't work at all. After some examination, the 1080 did not have a "custom" x-over, but instead he had simply taken the tweeter leads off the board and attached them to pins 2+ and 1- on the speakon jack for bi-amping. I posted about this at talkbass, and Bill (Fitzmuarice) mentioned that such an arrangement could present a very low or zero ohm load to the amp which would explain the distortion. I had also A/B'd both new cabs against my Eden Nemesis 210, and the problem did not present itself with that cab. So I have put the tweeter leads back on the board, and the distortion is gone but it now has a nasty hiss.
As far as the 112 is concerned, it didn't work because the woofer leads were not hooked up to the driver, and one of the 1/4" parallel jacks was completely broken. It was also not wired to bi-amp (as promised) and it appears the x-over is only a high pass network, since there is no inductor on the board. I do not know if this is normal.I repaired it, but overall the cab sounds a little farty on any note played on the E string.
So now I am $500 into 2 cabs that sound like garbage. The only warranty offered is to send them back for repair, which I refuse to do because then I will be without cabs and money, and I have no confidence that I would receive either at any future date.
I have just finished a fairly massive repair on my house that involved replacing my kitchen cabinets, some parts of walls and floors, 1/2 my shower, the bathroom vanity, and re-plumbed the entire thing due to water damage from the old plumbing, and am really not too exited about starting any other kind of project anytime soon.
But I need cabs that work.
Also as a moderately skilled hobbiest-carpenter, I have a well-tooled shop, and a good bit of 1/2" apple ply, and various pieces of cabinet-grade 3/4" laying about, which in conjunction with the drivers and miscelaneous hardware in the Dr. Bass cabs would reduce my DIY costs to about zero if I choose to go that route.
At this point my significant other has prohibited any further bass-related purchases (aside from the cabs I also bought a new head and a new bass), so spending more cash to get to where I want to be is out of the question. But I have time and I have materials, and no working cabs right now(I traded the eden 210 to a friend in anticipation of my new one's, and I also have a blown 215).
Bill's designs appeal to me from a sensitivity standpoint, but their complexity is is something I'm worried about undertaking after just finishing up the four month house rebuild.
Since they are so many knowledgable and experienced folks around here, any input you could provide me on getting my cabs to work, or should that fail, which of bill's designs would best suit the drivers I have available, would be greatly appreciated.
I am sorry for the length of this post, but I really have no idea what direction I need to go to get from here to someplace better.
(the Jacks need their own driver). With the Jacks, you can bring one or two to the gig. 
In any situation you can always turn down. 