i'd say you got the best and probably the most expensive(aside from turbo or engine work) already done with the PC track. most important is clutching like others have said, like you've probably read most people love the m8 orange sec. spring but personally i think its a bit to stiff and like the speedwerx black/org. better. the speedwerx spring rates i believe are 140-270 vs., if i remember correctly, the org. cat springs 170-280. aside from that i'm happy with RKT recut stock head(cheaper than there billet heads) for a bit better snap on the bottom end, lots of venting, running board cutouts( many to choose from but i think if i did it again i'd go with the plastic ones as the aluminum ones do collect a bit of snow), BDX 2 wheel kit, and i did the '09 bumper kit for $38 with cat parts. the boss seat is nice but can be spendy unless you can find a good deal on a used one, i just picked one up for $200 so theres deals out there if you can find them.