I have a hard time endorsing the Power Quad transmission. I've only driven one 7810 with a powershift for a short period of time. Seemed like it shifted fine. I have doubts that a person could have that much trouble with an 8000 series powershift unless it was a '93-95 model.

We had a 7810 with a powerquad and if you're going to use it for field work only it probably isn't the transmission for you. C-range was too fast for most field operations to allow for any down-shifting on the ends while B-range had you running full throttle to get the speed up where it belonged. Pulling a grain cart with it we constantly had to cross ranges. Dump in C-range and then jump up to D-range to go to the truck or catch another machine. What a pain in the rear. If you're going to use a loader they are the best(with exeption to IVT of course), but I would sure be looking for something with a powershift or IVT for extensive field work.