Right now I am not running an SLI rig or anything, but am looking to buy a PSU that will last me a good long while. Is the 510SLI worth it? In the future I will be running an SLI rig and an A64, and will want the native 24 pin. Also will I have problems using a 20 pin adaptor for my P4? My biggest question is will the 510 last me or will something like ATX3.03 come along?