Not sure why you prefer the ground contact mower over suspended. The suspended provide a cleaner and more manicured cut, and their less likely to sustain cracks and damage from bouncing around uneven terrain. Ground contact types usually start to crack at welds and stress points because of their short "wheelbase" and bounce, while suspended use the large diameter tractor tires and longer wheelbase as its suspension and wheelbase.
I can do anything and more with my terrain following deck and position control than one can do with a suspended deck. It's very easy to adjust cutting height up or down on the go as one travels over uneven ground, e.g., driving across a small ditch or ravine. Simply lower the position control to allow the deck too lower down into the low spot to maintain proper cutting height. Conversely, raise the position control when crossing a hump, stump, etc., and subsequently lower it back to the stop to return the deck to the previous (wheels on ground) position. I usually position the position control stop somewhat below the wheels on the ground position to allow the deck to lower into minor low spots. If forced to mow very soft areas, I raise the position control to take the weight off of the gage wheels to avoid tracking, in effect operating in suspended mode.
Regarding stress cracks: I bought my B1750HST new in 1994 and have used it every year since to mow a relatively large, steep and quite uneven area. No cracks, breaks or failures of any kind to the structure, etc., in the nearly 23 years that I have had it.
Morever, the newer suspended decks used on the newer model Kubota (andn others) tractors have much less grass clearance requiring slower ground speed in heavy grass to clear properly.
The single downside that I find for my terrain following deck vis a vis the newer suspended deck is less ground clearance when fully raised, making the unit more likely to high center on uneven ground. This, of course, is a result of the increased grass clearance of the older design deck.
My experience is that most folks who prefer suspended decks do so only because they do not appreciate the advantages of the terrain following deck.
SDT