Xbox 360 Arcade: Will the 512 MB memory be enough?

I'm intending to buy a 360 to get access to its exclusives. However, I only intend on playing offline games and am not interested in XBLA. Will the 512 Mb memory be enough to save the game saves for 3-4 years for say 20 games? I don't want to buy a new HD just to save my game. What do you think?

Yes, if you plan on only playing single player games and no download content than 512mb is plenty.

I would at least get a 20 gig hard drive. Those are only like 20-30 bucks now. You got plenty of storage, and you dont have to worry about upgrading for more space.