Which Xbox 360 game to buy?

My parents are planning on buying me another Xbox 360 game soon, and I'm thinking of buying Guitar Hero III or skate.

I already have the following games:

Halo 3
Call of Duty 4
Mass Effect
Assassins Creed
Bully: Scholarship Edition
Project Gotham Racing 4
Forza 2
Gears of War
Rainbow Six Vegas 2

I absoloutely LOVE Halo 3 and Call of Duty 4.
I'm not planning on buying BioShock, though I've heard its a good game, I played it and didnt like it that much.

But I love any kind of game, as long as it's really enjoyable. Highly rated games make my choice a bit easier.

Yes, The Elder Scrolls IV: Oblivion is an excellent game to buy, so now it's still between those 3 games. Help me decide.

hmmmmm how about oblivion its a really cool game and i think you would like it but you may want to rent it first or something its called The Elder Scrolls IV: Oblivion

Get Skate

Add FarCry 2 to your consideration and tell your parents to wait for some time because FarCry 2 is releasing on 1st October or maybe end of September.

FarCry 2 is one hell of a game (I think you know its popularity yourself), you should definitely wait for it but if you want a game right now than go for Devil May Cry 4. Its a great fighting game no matter you have played its previous parts or not you are still going to like it. Such quality action games release in years. I have never seen such beautiful cutscenes in any of the action games before.

Its a fast pace 3rd person perspective sword/gun fighting game with high rating check it out on www.gamespot.com.

As far as oblivion is concerned its a real masterpiece RPG. Perhaps the best RPG i have known, but after playing Mass Effect and The Witcher (PC Game) I don't like oblivion any more (major reason: graphics). The world of oblivion is no doubt beautiful but as you have played mass effect already you will find oblivion quiet old looking in terms of graphics.

My final advice is that you should wait for FarCry 2, that is a game worth purchasing or purchase Devil May Cry 4. I don't know anything about guitar hero III or skate so i cannot recommend you anything about them.