What Games should I rent or buy now?

I don't buy many games and have enjoyed the games that I have played so far.

I have Gears of War, Saints Row (Selling it), Oblivion and NBA 2k7.

I'm thinking about getting games like R6 and others, but I just want some opinions. I  might be interested in Winning Eleven if it's any good (I hear both positives and negatives about it all the time).

Also... which games should I wait for. I'm thinking about games like: C&C, BioShock, Crackdown and even Mass Effect for the near future.

why not rent oblivion i own it and i haven't played it yet but i hear it's pretty good but I'm playing pgr3 right now and I can give you a review on pgr3 if you would like to read it alright here it is, what you can do in the game is you can over achieve in playing novice and easy and then after that you get bonus cars then you play the challenge that you won and then play that then you start to play normal then you over achieve again then you are able to do a lot of good stuff like sell you bonus cars and then you can buy a new car and then you play the challenge that has a gold level and then it will be much easier to win in the challenges that you can play in.jdwollmann