Hi.
I'm going to jump in here and second the JLM LA500. Everything lobsterinn said is spot on IMO.
I have both the LA500 and the SoundSkulptor CP5176 and which one gets used really depends on the material and other parts of the chain. They're both equally capable, with the LA500 definitely being more "set and forget".
FWIW, I'm not really that familiar with the originals that these modules are based on, so take anything I say with a pinch of salt. I do a fair amount of the DIY stuff myself and am currently also building some other 1176 derived pieces for my rack: specifically two of Igor's F76s, which are supposed to be rev. F based, though I think in reality Igor always put his own unique twist on things, so I'm not sure how faithful the F76s will be in the end (the pcbs are available at
Ramshackle Recording | Ramshackle Recording, but you have to source the components yourself!).
If you haven't already visited, go to groupdiy.com and look at the white market sub forum to see what's available to buy at the moment or alternatively go to the dynamics sub forum to see what people are building at the moment.
Finally it's worth mentioning that if you're doing the DIY thing just to keep costs down, then both the SS and JLM kits are probably the best ones to look at. The SS CP5176 is probably as cheap as it gets for a 500 series 1176 with respectable components. Great deal, no hunting around for parts, and good instructions. Same can be said for the LA500, plus it's even simpler to build than the CP5176.
There's also another 1176 (rev. A) partial kit at:
the DON classics.
Hope that helps, and sorry for the long reply!
Kaz