Nice to see someone from my neck of the woods here on TBN. You are not too far from Swantak in Oneonta, he sells Mahindra and I have two, er three friends that have bought from him with good price, service and follow up. I am not fresh on Mahindra prices, but they seem good compared to Kioti, certainly lower than the big three and heavier built tractors in some regards. Certainly resale is not as good...There is also a Century/Zetor dealer in the Binghamton market - Middendorf tractor i think....very heavy built machines.
I think in your price range it would be better to buy the right size tractor from a lesser brand, then a too-small tractor from the big three. I am not particularly fond of the 790 - it is a tight operator station, someone light overall weight, and lower cap. hydraulics. Plus I dont like the gear pattern much...anyhow, you asked about the shuttle on the Kioti 1914- I am quite sure you have to hit the clutch to change gears or direction, but for direction there is a simple lever on the steering column for quick F-R....this is a simple durable setup, but not a 'power reverser' that removes the need for the clutch etc.
Good luck shopping