I got to chime in. I own a 03 wrx and did an sti conversion, put a built motor in and immediately stripped 1st gear out of my box. (new trans) then twisted 2 axles (two new axles and hubs) then got rodknock (one new rebuild). Got it all back togeather then used it to race.....(two more rebuilds)
Last rebuild lasted 270 miles before improper machining on the crank spun a bearing again, crank is toasted. (new shortblock from subaru). I now have a brand new block, heads, pumps, all new drivetrain, all new everything from replacing it as it breaks. I now have 297.6 miles on it and won't take it in to boost, I returned everything to stock levels because I couldn't afford another headache. Most of that was my fault for boosting hard and trying to find the cars limits.
After all that, I think it is a fucking awesome car, I beat a c6 corvette on an uphill climb going to big bear, I love the feel of the drive and the car. I think too many mods for this car can ruin it, It is really hard to mod with the way it is set up as well, too many weak points with the all wheel drive. Intake and exaust is about as far as I would go.
Any way, I have put too much money into it and have decided to stick with the supra, The subaru is basicly brand new and will go up for sale for 13,000. I have put alot more money then that just bringing it back to stock and putting the new motor in. Know what you are getting into, decide your expectations and then go for it. Plus mines for sale so you should buy it.:naughty: