i'm just stating my personal opinion. buying a brand new car and modifying the engine past the power output intended by the engineers who designed it... it may cause issues.
if you had asked me this question about a month ago and i'd say do some suspension upgrades, get a tbe and a tune and you're good to go.
now, i have a spun rod bearing and a $5k problem on my hands. i've changed my oil between every 3-4k interval with synthetic and replaced sparkplugs at 60k (done by dealer), i don't race in any way. i've done 2 auto-x's but thats about it. no drag racing or drop cluth starts ever.
so my opinion still stands...keep it stock enjoy what you have, enjoy your warranty and if you want more power, save some cash and buy an sti.
sorry had to vent, a little upset about my car