I can't offer advice on the other two (except to say I do have the MasterCarver Rotary system and really like it!). My microcarver is the RAM 45 and I absolutely love it. My MasterCarver Rotary can do detail work, but the smoothness of the detail isn't as nice as the RAM, at least for the quality detail I want. Hope this helps.
Whatever you decide, please let us know your opinion of it! Thanks!

Deborah