I realize that the Quietline Series is not for everyone. A lot of complaints about the engine isolation rail system. Lot of people don't understand the concept nor want to spend the money and/or time to fix it the right way.
Now me, on the other hand, have a 1450 and it is one of my favorite tractors. Mine is a work horse, doing many tasks. I fixed my motor rail system and haven't touched it in 5+ yrs. I have a single hydraulic circuit (standard quipment) and planning on adding a second circuit. The maintenance is (IMHO) is not any more or less than any other tractor. It is what YOU put forth, in the time and quality of repairs.
That being said, the decision is yours.