A modded automatic can still be fun, I don't know about an automatic Integra specifically, but some cars i've driven or been passengers in we're automatic, modded and still alot of fun. The only downside is that you need a bit more power to go the same speed, you usually have 1 or 2 less gears in the transmission, and it cost enough to properly build an automatic to handle the power... actually, like SP00NFed said, ever think of selling yours and buying a 5 speed, it would be a much better starting point, less expensive and more fun.