I can afford to buy a game a week so issue isn't even the money for me.
Issue is that there are like a dozen games coming out I want to either buy or rent and I know most of them will take me a week or so to complete, some more...
I'm already delaying my purchase of LBP and Motorstorm 2 due to still playing Bioshock and I haven't gotten on DeadSpace/Fallout 3/Far Cry 2 yet either (whenever gamefly decides to ship it to me...)