[crazydave]

When you sat DRs, do you mean 100% of the time or just for fun and track days? Just be aware DRs, even Nittos,affect the cornering of the car. I hate how my car handles with the DRs on the back for daily driving, they are great for straight line pulls, but they noticeably suck in the twisties on the street and the rear feels like its wandering around and not planted, due to the flexible sidewall. The great thing about this car is its really great at 1 thing, but its good at everything, so as soon as I'm done at the track the street tires go back on.

HX are great, but if you are not 1/4 mile tracking it I would save your money. The stock system for the most part can keep up as long as you are moving and not under boost alot, like 1 or 2 WOT gear pulls on the hwy. The aftermarket HXs don't do much when you are under boost, (they do help a little, maybe 5-10 deg IAT2 difference at the end of the 1/4 in my experience), but where they excel is recovery time. My IAT2s came down twice as fast on the return road at the track in comparison to the stock HX and if you are on the hwy cruising, this is not really going to be a factor.

I would advise you to just save your money unless you are serious about tracking the car.