prophetik music

Hey prophet, I'm looking for some advice: I remember from proofreading your guide to building a PC a few years ago that you mentioned not needing a large-output PSU even for using GPUs in SLI. So I'm at a pivot point: I'm looking to update my GPU in a bit, but for now, an attractive option is to get a second GTX 260 to tide me for a while (probably another year or 2) as it will only cost me ~$75 for another 260. The issue comes to my current PSU: it's 530W energy star bronze. And while it certainly seems to play fine with my 130W CPU, I think adding another 260 would kill it. Because I'm considering upgrading my PSU anyway to an energy-star platinum, I'm trying to figure out the best wattage that can support the temporary solution of 2x260s and an upgrade in maybe 2 years to a ~$250 single card. Google says ~650W min for 2x260s, but I have a feeling it can be stretched. Do you happen to have any advice here?

Thanks!

P.S. Any update on that traverse town sax/piano wip? : )