my xbox is like 2x faster than my old one and it is a lot quiter than my old one, my old xbox was very loud and oly very looud for halo (it loves halo)
the only reason you should get the 4gb xbox with no hard drive is if you don't play very many games or download a bunch of stuff. The 4gb xbox is all internal memory and so far, i have only used 1 gb or it's memory and i have a 5,230 gamerscore so this xbox it just for gamers that don't buy a lot of games
also a few weeknds ago when i was playing xbox, i turned it on and i got rrod because of my hard drive. my xbox sucks, the disc tray doesn't open so i have to open it manually by lifting the top part up so that means my xbox is all takin apart so the hard drive is loose. apparently this messes up the hard drive connectors and the connectors on the motherboard so now my hard drive is dead along with my old xboxs (electronics hate me very much)