Well, I'd pretty much echo what's been said. An '030 accel. , with as much RAM as you can get, an Indivision (unless you have easy access to an Amiga-compatable monitor) and a CF-to-IDE adapter. You might also want to take a look at English Amiga Board, there's quite a bit of advice regarding using CF cards on Amiga's.
I think an '030 should do fine for most gaming, and some light productivity too, if you end up getting into it. I love my '060, but it's definitely not cheap.... And it's maybe overkill if games are your primary goal.
Cammy, you'll have to give us details about using the USB rocket launcher on an Amiga... I thought there was PC-only software to aim it? Are you using a PC emulator for it? Anyway, should you want to escalate the war, here's a link to a version that can be daisy-chained, with a laser sight
http://www.thinkgeek.com/geektoys/warfare/8bc4/I wish I hade better skills with electronics. I'd like to do one with an integrated camera for aiming, displaying on the PC, and maybe an infrared (heat) or motion sensor for unattended firing.
Oh, and I'd add a USB plasma ball....:roflmao: