the glock 35 is a fine choice, but you will have to shell out some dough to be cometetive with it, remember, you are shooting versus some pretty good gear, ie sti, tanfoglio's etc etc.. i would go with a competition spring kit, (lighter striker spring, lighter saftety plunger spring, competition return spring, a stainless or tungsten recoil spring, combined with a recoil spring suitable for your loads... a mag well will help with the finiky stumpy glock magazines. you allready have a great disconector. You might opt for a match barrell if you care for a tighter chamber and better long range accuracy. I would also go with nice sites, like heinie blacked out rears and a nice sharp fiber optic front.
btw, by the time you get all of these parts, you are looking at 1200 dollars combined minimum, which is getting into the expensive category