I'd wouldn't really put a GTX260 level card and Core 2 Quad into the league of 'hardcore' gaming hardware these days, more like lower mid-range!
In my experience cheap PSU's are a bit of a lottery, they might be able to power what you plug them into but if anything does fail there's a 75% chance it will take everything else connected to it with it. Whereas the better PSU's just die quietly and leave everything else intact, you also get better warranties with branded PSU's
It's like risking driving round without a seatbelt on, you might arrive OK if everything goes fine, but have an accident and you're in trouble.