I suppose you can balance the DLC against the Online stuff. GTA4 supposedly has a significant online component, and if you're not a hardcore gamer in terms of time (with work, I only have a chance to play video games one day a week, and it's usually not online play - so if I wanted to play a game online, I'd basically be paying $8 to play the game for a few hours with XBL).
Especially for something like GTA4 which is primarily an offline game with an online component, you're going to be spending most of your time on the offline campaign, and might toy around with the online stuff - but it's not going to be the primary mode of play until you finish the single-player missions. So, if you're buying the console primarily for GTA4, the PS3 is probably a better deal if money is an object (strange as that notion is), and 360 is better if cost is no object (the DLC may be expensive, nobody knows if it'll be worth it yet, and online will be expensive for how much it gets used).
We also don't know what the DLC is. If it's more maps, then it's a much bigger deal than if they just include more side missions. If it's just side missions, and the DLC is a timed exclusive, then I think people probably won't care about waiting it out - the single-player campaign in GTA is quite long, and they probably won't even be finished with the main missions by the time the DLC became available on all consoles.







