For xbox live silver/gold, does a 256 mb memory card suffice? Or do I have to have a 20 gb hard drive specifically?

Cuz, in the manual it says I need memory, and that the memory card would do.

Any answer would help

Do,

Gears of War

GTA4

Halo 3

COD4 or

Team Fortress

require harddrives for online? and if so which ones?

p.s. is the only thing required for online play an ethernet cable and xbox live gold subscription?

I just wanna make sure I have everything necessary for online play

What is the most underrated game out for the 360 now?

Maybe it is misunderstood or just unpopular

Basically, what is the diamond in the rough?

Hey guys, I got a quick question.

I'm probably gonna buy a game tomorrow, and i'm debating whether to get Gears of War or Halo 3.

I'm looking for split-screen multiplayer and a co-op single player which both of the games above have. But, I've heard a few negative things about Halo3 (I dont have Live yet, but will probably get it in the future).

So I'm on the fence. Thanks in advance.