XlR8 is right on. I have both kinds of tractors. Go HST unless you are doing a lot of field work.
My CK25 is shuttle. I like it fine. But, when going into a heavy pile I find it is slower because in order to make sure I don't ride/burn the clutch and still get a heaping bucket, I switch from high range to low range (which means stopping), usually 1 high to 1 low, or going from 4 low to 1 low before digging into the pile. And have to switch back to transport. This is a lot of clutching.
Of course, if it's light material 4 low all the time works too.
HST is just better for this kind of work as well as for mowing and material handling. Just think if you let your foot slip off that clutch while loading into your truck and smack the side of your truck with your tractor. That should be enought to convince you.
Also with the shuttle, you are like a circus juggler between operating the FEL, the steering wheel, the shuttle, and the gear shifter - hands switching back and forth, up and down. Much easier with HST.