Should I Buy a Xbox 360?

[Wii_Master]

Ok I am a Nintendo fan here and have never given money to either Microsoft or Sony but now I am thinking of getting a 360 now (used) from a private seller. This doesn't give me any warranty but I think I am getting a good deal.

I am getting a Xbox 360, 60 Gig Hard Drive and Skate 1...

Should I buy it? I am worried that later on Microsoft may bring out a new completely different console or something similar like Nintendo did with the DSi XL.

What do you guys think and also what games and accessories should I get? I am already getting a headset and then I am also getting a 1 year XBOX Live.