My WRX has the following upgrades:
Samco hoses
Gruppe-S catless up-pipe
Perrin Downpipe with hi-flow cat
Supersprint cat-back (came on car)
UTEC with Turbo XS boost controller
Yes, I'm running the software on my laptop. Nathan Kofahl at Turbo XS indicated that they are contunally upgrading the software and may go to a "sporty" GUI, but for now, it's a nice simple Hyperterminal interface. I like the fact that the computer acts in a piggy-back fashion, allowing the stock ECU to control mundane driving functions, maintaining good general drivability. Then, when you mash the pedal, the UTEC gets in the game with abandon
I have to smooth out my timing advance just a tad, for when I stand on it in 3rd or 4th under load, the computer indicates an occasional knock. I have my boost set a bit lower than what you are running, just to keep me from standing too close to a grenade. I've had an engine grenade on me a long time ago and I'd rather forego a tad of power than repeat that experience. All that to say, Scott, your car likely produces a bit more juice than my set-up.
I'm really happy with the UTEC, however I've certainly heard lots of great feedback about Shiv and the Vishnu line of products. I happen to have a family connection to a dealer back east that does a lot of Turbo XS performance tuning, so that's the direction I went. From other feedback I've received, engine management is the real key to extracting optimal performance from these nifty little cars. Bolting on stuff without the electronics is a recipe for disaster.
Looks like a glorious weekend here in the Sierra! Cheers for Saturday!