Kubota diesel on the hills in WV, no problems with power... I replaced a JD 4500 35HP diesel compact, hydro, 4WD with the Ventrac. I thought the Kubota would be low on power (10 HP less), of course I didn't consider that the Ventrac weighed about 1500lbs less than the JD... Power isn't an issue.
Regular seat is comfortable.. I'm 6'2" and really put the seat all the way back and then move it forward a couple clicks. I usually drive it 4 hours at a time, no problems..
Canopy... I have a COOLTOP with a fan... It sits above the rollbar... No issues there...
Cool Tops Down Draft System, ROPS Fan, ROPS Canopy, ROPS Sunshade, Tractor Fan, Tractor Canopy, Tractor Sunshade, Mower Fan, Mower Canopy, Mower Sunshade
The contour deck costs about twice as much as regular deck (say $7500?)... I have one and used it once... PRS has one (he lives next door to my EX In LAWS) and uses it all the time. ITS HEAVY, hydro is at its limit picking it up...
You use the weight transfer to change the weight on the front end. That controls striping among other things... The Roller ROLLS your lawn to smooth out little humps and bumps. When its SOFT (spring or after a rain), set the WT to 0 and the 500lbs of mover flattens the bumps in your yard. Also makes it easy to move it in your garage. Roller also gives you more weight for traction. You can't take the roller off and you'll never know its there.
Rear discharge? WHY? Side blows grass out unlike anything I've seen... If you rear discharge, now you have loose grass under the tires and less traction (probably doesn't matter in level Alabama), it matters when you go up steep hills...
Foot control.... No need... You used your right hand and steer with the left. You control the speed and can raise and lower the mower (VENTRAC doesn't have brakes. only Emergency brake)... On steep hills you need your feet on the forward pegs to keep you from falling out of the seat.... HENCE hand controls are better.