yeah could definitely get a cheaper PSU. i like to recommend SLI capable PSU's just cos...well....at some point people may want to go SLI.
plus, if i had to buy a new one, its what i would buy for myself. actually i'd get the 620, because i want a modular next time.
but yeah nothing wrong with the silverstone, fsp, xclio, and (i know some disagree) my coolmax 500 has been runnign along without a hiccup for almost a year, pretty much non-stop. so, i would recommend it as well. the SLI that i have is like 70 bucks.