Andy, if you want all the options of a DA or DX model, then I think you should consider that the hydrostatic transmission is standard on those models. If you opt for the SS transmission, then you will have to add several of the options you want. It will not matter which transmission you get for having "cruise control." The DA/DX models have cruise control on the hydro.
I can tell you that I consider the hydro transmission as much a desireable feature for mowing as I do for loader/dirt work. You can adjust your groundspeed instantly by varying the hydro pedal when you get into tough grass or bumpy terrain without having any effect on the PTO speed to your cutter. You can also slow down and instantly change direction without having to worry about shifting or shuttling. If you cut on a slope, you can back down with the hydro and reverse directions back up the slope without even touching the brake. I can back my rotary cutter up to a tree and then go forward and adjust my position about four times for a close cut all the way around without a single gear change, throttle change, clutching, or shuttle. I just pay attention to what I'm doing with the cutter and let my right foot do what has become second nature. This is not to put down shuttle shifters. They are great! I just think the hydro is ideal for dirt work and mowing.
The only thing I would drop from your list is T-n-T from your dealer unless he has done many of these and can do it at the cost of the system from CCI. I would get the remotes and do the T-n-T myself. It's only minor plumbing, hook it up, and use it. If you have to wait awhile for Mark Carter to get the parts, I think it's worth the wait.
Another option you might want to consider is a tiller. That's one of those things you don't have to have, but once you use one, you don't think you could ever live without one. Do you foresee doing any plowing? For plowing, the shuttle shift is easily the best choice; however, for running the tiller, the hydro is superior because of the ease of speed adjustment.
Good luck with your purchase. /forums/images/graemlins/smile.gif