Dave, first of all I must say I have a 2011 Kubota RTV 900 XT and I do love it. I use it one my cattle farm in Arkansas. Here's a few cons: Ignition key is positioned beneath the steering wheel and my knee will hit it when dismounting; vibration from the diesel engine, restricted leg room (I'm 6" 1"), poor quality guages, terrible location for air intake, and stiff suspension which also is an advantage for capacity. Pros: Powerful, love the hydrostatic transmission, power steering, and true hydraulic dump although I don't use it much but wouldn't do without, robust built. The intake can be route up with conduit of flex hose to correct the dust bowl location of the OEM intake or you can purchase the high price hi-rise hi-capacity air intake like I did.
If you don't like the belt drive trans, you stuck with either the Kubota or Honda. I am one that doesn't like the belt drive. Honda is pretty nice with a 3-speed automatic trans and a single cylinder gas engine. I just didn't like all of the plastic on the Honda and it's not too robust built relative to the Kawasaki and Kubota. It does have a great suspension.
Kawasaki has great ideas like using the ROPs to raise the air intake location up high out of the dust area. Kawasaki has a stiff suspension very similar to the Kubota.
Today, I would still by the Kubota RTV 900 XT. I probably would have had the Kubota glass windshield installed if I bought it today just to save some cash. I high recommend gettting the ATV style tires. They clean out well whereas the worksite tires do not cleanout, so I'm told.
I think you're doing the correct thing in asking for experience; however, as one has said, you'll get biased opinions asking other UTV owners. Go drive all that make your wish list. Please don't forget to buy from a reputable service oriented dealer.