How would you compare this model to your B7800 model?
My B7800 is 30hp and the B2650 is 26hp but surprisingly I found out that the B2650 engine is the same 29hp engine that Kubota used for many years. So I know the engine is sound, but its governed down to slip under the tier 4 engine requirements for needing systems such as DPF.
The main reason I bought a new tractor (my old one ran flawlessly for 14 years) is I wanted the factory cab for winter work. I expect that my new B2650 will do everything my old one did but maybe a little slower given the smaller hp, but a yeck of a lot more comfortable!
From what you said, you won't be using it a lot for things like mowing, snow blowing etc? It's mainly going to be used for loader work? The B2650 should be great loader as long as you're not lifting anything heavier than say 1,100lbs everyday, if you do, then something in the L-Series would be a better fit for your needs.
Just a couple of tips for loader work. If you plan on moving brush, logs or even stones as you mentioned, or a million other things really, a set of pallet forks will serve you well, and with a Quick Attach loader its easy to switch from your bucket to your forks.
Also when lifting with the front-end-loader (FEL) make sure you have the proper ballast on the rear 3-pt. If you don't, you'll put too much stress and wear on the front axle, it'll also be unstable when driving. You can pickup a Kubota Ballast Box (adds about 600lbs.) for a couple hundred bucks or make your own, or use a 3-pt attachment of simliar weight.
Kubota's are great tractors, but like anything you need the right tool for the right job.