As a manufacturer of attachments, it would not be advisable for me to recommend a particular type of carrier over another

. Politics, politics...
But I may say this:
- the customer who bought our first front-mount head put it on a Gehl 7810 and never had problems with it;
- a few CAT 287B tracked skid-steers have been running with our heads without problem either;
- the new CAT 297C seems to be a good machine also;
- we sold a fair number to go on Supertrak SK120, and they have been running good also from what I was told;
- and I know a few people running ASV RC100 and they were working ok from what I've heard.
Often, the overheating problems seen on some attachments come from that they have a fixed-displacement hydraulic motor. These motors generates more heat because they repeatedly go in relief under effort. On a variable-displacement motor, when the attachment is under effort, the displacement of the motor changes to a higher-torque volume instead of going in relief. Granted, variable-displacement motors are more expensive. But you might end up saving on the number of skid steers you burn down.
Here's a picture of that first front-mount unit (DAF-180, now DAF-180E, which has a more robust pusher bar than the bent one shown here

)
Good luck with your business!
Frederic