Since I own all the current-generation consoles as well as a gaming PC, whenever I decide to buy a new game, I tend to end up having to do a decent amount of searching to see if there are any significant differences between the different versions of the game.
For example, some games run better on the 360 than the PS3 for some reason. Others may be able to run at a higher resolution on PC than any of the consoles. Some games even have slightly different content on the different platforms.
Is there any site that tries to comprehensively list and compare cross-platform games, perhaps recommending a particular platform for each game? It seems like this would be a fairly common need for people that own multiple systems, but I've yet to discover a site that does this.