There are currently 4 types of Xbox 360, and they are:
> Arcade- 256MB MU
> Pro- 60GB HDD
> Elite- 120GB HDD
> slim- 250/4GB HDD
They're all good, it doesn't really matter which one you get but most people would always have an opinion as to which one you decide to get which is great and I respect that but there isn't any point to it.
Mostly it's about what games you like and play and what your good at and whether or not your trying to beat someone to a certain amount of Gamerscore or stuff like that.
If it is needed for any reason at all I can get or write up walkthroughs and cheats and such or I could give a list of the games that will give you an easy 1000 or so Gamerscore, only need to ask.