Ray,
I took the plunge a little over a year ago, and bought the APEX kit with an extra 100-grit stone, and pre-mounted grits to 1000.
It is pretty easy to set-up. I do not have any experience with the Pro setup - however, I think that for home use, the APEX will stand-up to almost anything that you'll throw at it. It's pretty compact, but built with high-quality, sturdy materials. I was amazed at how easy it was to use.
I didn't know just HOW dull my Wusthoff Classic set was getting, until I sharpened them up on my then-new APEX. (I take pretty good care of my cutlery, and steel the blades carefully between uses.)
When you get it, WATCH THE DVD FIRST!
Only thing to be careful about - You may want to set-up a place to use this on a work bench or basement area. (Maybe a chunk of board with some laminate on it, that you can C-clamp down to a bench top somewhere - you want a smooth surface for the suction cups to cling to, but it does produce some messy grit - particularly, after a full hone and sharpening of several largish knives. I would not use it on nice, shiny Granite countertops - at least, not if you want them to STAY shiny! Ask your local builder / counter-top guys if they have any scraps / sink cut-outs with laminate on them.)
You can also score "Brownie-Points" (free beer, etc.) by sharpening knives for friends and relatives.
Other than that