Excuse my ignorance but what's wrong with the t50 staple if the gun seats them properly?
After much research on electric, I bought this Italian stapler a few years back. http://www.amazon.com/Maestri-ME-El...ref=sr_1_1?s=hi&ie=UTF8&qid=1322415661&sr=1-1. I think I paid about $170 for it at the time. Curious what makes the air powered better? This one is works pretty darned well other than it jams more than I like. It's real light weight and the electric cord makes it flexible compared to an air hose. The staple is a bit narrower, is this a problem?
The electric staplers are much more expensive, they do jam more often and require more maintenance than air staplers. With air, you can also adjust the pressure for different materials, so it is a little more versatile.