UPDATE!!!! In the ninth hour, we went with three phase!!! Bigger saw, longer slider, over-arm dust collection, and a micro-adjuster on the fence. We discovered that there was an old 3-phase line in the ceiling, and the electrician said all looked good to hook that up and save a ton of money on the 3-phase!!! Woo hoo.
So it is official- deposit made. Felder K540s