@Odin
Nice move son. The Dreamcast is a great machine. I have one with Shenmue 1 & 2, Dead or Alive 2, Quake 3, Sonic Adventure 2, Soul Calibur & Virtua Tennis 2, Sega Smash Pack Vol 1 & Sports Jam... All fantastic games. Other good uns I have are House of the Dead 2, Jet Set Radio, Le Mans 24 Hours.
I got Joypads on eBay for around £15-£20 a pair iirc.
I've heard that you can get an ethernet adaptor to replace the modem but it's VERY rare. I haven't got a clue where you can get hold of one & if tyou do find one. I doubt it'll be cheap.
FuZion.