After spending a couple hours reading the 450 cam mod moster sticky, searching through various follow-up posts, talking to my mechanic and my yamaha dealer, I've decided to go with the Hot Cams (with the TT plug) rather than the OEM 450. If the price difference between the HC and OEM was more than it is ($45) I'd consider the OEM. The HC was in stock here in Boise, so I'm dropping the bike off today to have it done. I do alot of my own work, but it's only going to be about $60 to have my mechanic do it, so that's money well spent imo. I'll post full reviews after I get some time on the bike.