It'll only cost you $1000 for the complete upgrade set to helical cut gears and syncronized setup if you supply the tranny core in install everything yourself. That sounds good, but you need a core for that.
The $1600 sounds kinda pricey, but a 'race' prepared TKO is over $1700 from Darkhorse Performance and rated at only 500 lb/ft of torque. So far this sounds like a deal. I'd be partial to buying a 'kit' and installing it myself in my own core. They sell T5 rebuild videos from gearzone.net. And speaking of them, try the link and see if they have anything that might apply or stir your interest. http://www.5speeds.com/ . Funny, I thought this was different, but as soon as I went to the link, I got the G-Force tranny parts when I looked up gears. They are supposed to have a good rep as far as I know and I have emailed them in the past, because I will be upgrading my WC T5 with some of their parts, BUT I'm not spending the kind of money for a super strong unit because I frankly will have under 400 hp to begin with.
Davy