Ive been addicted to R-Type all week. I prefer the Amiga version to the arcade version (I have Mame on my xbox too)..
I also took great delight in decapitating my partner as I challenged her to a game of barbarian!
btw.. if you are going to put mame on your hard drive then be warned the roms take 8 gig! (you cant actually have all the roms in the rom folder either as the max number of files per directory is 4096 and mame has over 5000!)