undercut

So I've got a '97 with ~20k miles that i picked up this summer. I rode it for about a month before second gear started skipping/slipping under full throttle at high rpm's. After researching here I concluded undercutting the tranny through Sean's shop this winter is the way to go. I continued to...

Ok. I'm about to have this extra transmission worked on, but I can't make a final decision on what setup to go with. Please vote to help me decide because I have to get this thing sent out in the next two days. My driving style is: Not hyper-speed, but power sure is nice. I live in: North...