Mike, I have the RAM 45, it's wonderful! I've had mine for at least three years, have only replaced the brushes once so far and haven't had a bit of trouble with it....and it has had a LOT of use!!
I honestly couldn't be without it and had considered for some time buying a backup unit. I got to thinking I really couldn't be without my woodburner either and while looking at units came across the MasterCarver Combo, a micro motor and a woodburner combined into one unit. Since I really like my MasterCarver Rotary Unit, I decided to ask Timothy at Wood Carvers Supply about it, I liked all his answers so decided to give it a try.
Neat thing was, I was carving two fairies at the time, one I did the detail work with my RAM 45 and Colwood burner, the second I did with my new MasterCarver Combo.....know what I noticed different about the two units.....nothing! The MasterCarver Combo is one I would recommend highly also. Here's the website, if you want to check it out
http://www.woodcarverssupply.com/store/ They also make separate micro and woodburning units, I haven't tried them but the quality of the two units I have make me confident to recommend them! Hope I haven't muddied the waters too much for you and have helped out a little bit!

Deborah
P.S. If you look at my website in the Newest Carvings section, the fairy with the basket of strawberries is the one detailed with the RAM 45, the quilting fairy is the one done with the MasterCarver Combo.