I've had, at this point in time, 30+ modded Marshalls and another 25 stockers all vintage from 1990 on back. The Camerons have been the best overall to me; with Shea's work a very close second. I also know a few guys who own Mr Hopkins work and they also have had/still own Camerons and they love Dave's amps. There are a few modders out there that stand above the rest for Marshalls and I consider Shea and David to be among that group, with Hermansson and Mr Lenz up there too although I'm going off clips of Eddy's work. I've had Gower, Fortin, Voodod, FJA, Golub, etc etc and all sounded good to great.
But, in the end I've returned to a stock Marshall + a pedal or two and I'm happy. If I were still playing out I may still have the last modded Marshall as that was a 3 channel Cameron that had a killer Jose, great clean and totally transparent loop. The Aldrich channel was thinner than the Jose but could have been a perfect lead channel.
I don't think you can go wrong with any out there; obviously the Cameron stuff you have to come across 2nd hand.