The quad (140) race box is supposed to be a nice one. Paul and I both run a Ramifier from TSPerformance in Bowling Green. I've been pleased with mine, Gap and I even made a trip up there. Dennis spent about 4 hours tweaking my box. He even seemed excited to do it.
The one thing I don't know about is how the quad box stacks with other boxes. It may not be stackable. Seems like it does Timing and Pressure, which would effectively eliminate it from being a combo with another box. The TST PMCR that Nick (Cumminsman) mentioned and the Ramifier makes a N-I-C-E stack. Of course, those two boxes will grenade a turbo before you can get to the end of your street if you crank them both up. On the flip side, that's the nice part. It's a set up you can grow into... Blistering power today with your stock charger, Sick SICK HP with some other mods. That's my . 02
Also, lemme plug Nick and Meacham. Two of the best guys you'll ever meet (I'm gettin' misty eyed just thinking about it. ). Done business with both of them. Don't buy anything without calling them first.