I wouldn't worry SO much about the dealer you choose. I know most people won't agree with me but I think a lot of people stress going with the best dealer too much, they read it SO much on TBN that you start thinking ya, you really need to worry about the dealer.
Sure you don't want a horrible dealer but when it all comes down to it, your tractor isn't going to be at the dealership all that often. You will be using it a lot more than you deal with your dealership, I'd rather be happy in the tractor I like, and have to deal with some annoyances from the dealer, than be in a tractor I don't like as much, yet I have an awesome dealer, for those once every couple years that something actually breaks. Most services are pretty straight forward.
I think if your using your tractor for business and can't take the chance of being stranded and broken down for more than a day or so, then the dealer support becomes more important. However, I'd like to know how many people actually are dealing with their dealer on a weekly or monthly basis, if they are, then they're tractor has serious problems.