Scott,Absolutely on the foot throttle. I came out of a 2005 MF 1540 and the foot throttle on it was much better. As you said, its too far back on this one which I also believe is due to the fender mounted loader control. And I too was in the same situation on the 1840. My dealer doesn't even stock them due to the almost $3k difference for the exact same machine just with different ECM programming. I don't think I will miss the 2 more horses for what I do. The overall size and weight of the 1835 in quite a bit more than the 1540 also which should make it more stable and better at putting the power to the ground. I only run a 5ft rotary mower and 6ft finishing mower which it should handle just fine. I already widened the wheelbase front and rear to add to the stability due to having purchased a grapple and 3rd function (which I figure I saved on the 35hp vs. the 40hp). I hope you will be as pleased with yours as I am mine (so far anyway)!
And FWIW my BIL bought at the exact same time as I did and the exact same Tractor except he got the hydro open station also. And so far he loved his too. The hydro with the speed and sensitivity levels with 3 ranges is awful smooth and fun to operate. I hope I don't kick myself in the rear later on not going with it myself. My 1540 was a synchro shuttle and I've always had clutched tractors and just stuck with what I know. But it was a tough decision!
If you have any intention on any ground engaging work then you will not regret the shuttle. You will have more grunt to pull a plow, disc, even rippers on a box blade. Should also be a little more fuel efficient.
Speaking of that I have a couple of questions for you.
1) How is your fuel efficiency so far? I know its hard to quantify on a tractor but just in general.
2) What size bucket did you get for the front loader? I went with the 72" on my order to match the 72" box blade or land plane that i have for the rear. Hopefully it isn't too oversized for the loader.