I talked to SGP about a month after the hurricane and they were hurting bad. Even before that, I heard they had some quality issues. But as far as I know they are the only place in Houston that has experience with the VQ35DE and our transmission. If you look at their website, they have a TON of cars done. No doubt bad news spreads like wildfire, but the problem is that Houston doesn't have a lot of shops - that I know about.
There is also Secret Services - building a good reputation for itself, but not much 350/FX/G35 experience.
I'm still looking for a local transmission shop - a place that can do a torque converter, valve body upgrade and cooling. It's the last major mod before I try to go Turbo. If any of you guys know some local places I can check out - I'd be much obliged!