I'm jealous!!
Congrats!
TVS is definitely the smart and cost effective choice to get to what I feel is the max the chassis/drivetrain can withstand in stock form. Without an IC you'll get even better throttle response and less weight.
To make my M62 deliver the same HP consistantly, I would need to add air/water charge cooler, water pumps, monitor pressure, etc. etc. -- a lot of weight for the same results as a TVS with no IC. TVS is a simple elegant solution, but so are most of Phil's solutions - top notch.
Rob