a little while ago i posted a similar question but honestly i didnt get the response i was after. please listen this time.

for christmas i want to get a new console. BUT, im not asking what do i buy, i am asking what would be better for my situation.

I like good graphics, if a game has crap graphics i wont get it.(very important to me)

i like online play that has no lag

i like or want to get these following games ok:
assassins creed
GTA IV
EA Skate (and 2 when it comes out)
and if possible, The Orange Box.

i relise that paying more in this case would be better but i dont need the blue-ray player.
and one last thing i am wondering, like PS3, can you upgrade the hard drive space on a 360?

overall 2 questions.
Whats better for what i want?
Can you upgrade the Hard drive?