Here is my opinion on what to buy.
i have owned a Rayco1625 Super Jr., a Bandit 2900T, and a Carlton 7015TRX.
The Rayco machines are built stout and mine was very dependable. I did not buy another Rayco because the larger machines are very heavy, they have no track machine other than that little dinky one, and until recently, Rayco did not offer remote control. All the Rayco machines have a very slow ground speed. I would pass on Rayco.
My Bandit 2900 was an earlier model, but they have not changed much. It was very hard to work on anything. Hoses, and about everything else you might need to fix are very hard to get to. mine had some design problems, but Bandit did help me out on parts/kits to upgrade it. I did the work myself. The Hydraulic driven cutter on the bigger machines, is not as effecient at delivering power to the wheel as a belt drive machine. My current Carlton has 20 less HP and cuts much better than the Bandit.
My Carlton 7015 TRX is a fabulous machine. Fast travel, fast at cutting, very easy to service and maintain, will get into almost any location, remote is very easy to operate.
I think Carlton machine are all the standard, that everyone else wants to come up to. Carlton is way ahead in every aspect as far as I am concerned. The 7015TRX is in my opinion, probably the best all round stump grinder made right now.
Vermeer, forget it. Too many problems on their machines. Vermeer needs to get out of the stump grinder business. Their machines are sorry, compared to Carlton, Rayco, and Bandit.