Could this be the power supply to end my search?

sailer

Splendid
It looks good, has enough power for what you have and will allow for some expansion. You might also look at the Thermaltake W0116RU 750wt psu. It has an efficiency rating up to 85%, compared to the Silverstone's >80%. The Thermaltake is on sale at Newegg for $159.99 with mail in rebate, so it ends up at the same overall cost.