Buckhunter - I've got a similar set up currently. I recently swapped to a 3.80 gear and love it. I also have 15" wheels running 235/60r15. I'm currently forging my way through a T5 swap though.
As far as a DIY job... wish I had that level of expertise. I paid 100 to have the third member media blasted, painting and the gear dialed in. It isn't hard to do, but your typical DIYer doesn't have the gauges and press handy.
Good luck.