About the off leash thing, you'll probably get mixed feelings about whether it is ok to do or not. I'm one of those that has to do that same thing so as long as the area is away from traffic, I'm alright with it.
Breed types that are good for off leash, IMO, are terriers, herders, and retrievers. Breeds that are likely to be a bit more troublesome off leash are hounds and spitz types. As always though, there are always exceptions, just like with fish.![]()
It's important to get your dog to respond to recall commands whether or not you plan keeping it off leash most of the time, just for those times when it might get away from you in less than ideal situations (i.e. high traffic areas etc). But I agree with Taysius, if you're away from traffic, it's cool.
She brings up another good point about certain breeds being off leash. Training is important, but breeding also plays into it as well (to a certain extent). Breeds like retrievers & herders (Spaniels are retrievers) have been breed over time to work in conjunction with their handlers out in the field. Thus those breeds tend to respond better to commands while off leash. Hounds on the other hand are breed to track quarry down on their own & keep it a bay until their masters arrive, thus they are breed to do their job with less handling by their masters, so they tend to be more "troublesome" off leash (especially the sight hounds like Salukis, Afghans, Greyhounds etc).
But like Taysius pointed out, there are always exceptions (e.g. she opined that terriers are OK off leash & yes some are but there are exceptions for instance like the 2 JRTs your friends have are not OK off leash). IME JRTs are horrible off leash (too much prey drive, so that's one exception right there). Training can mitigate some of this difficulties to a certain extent, but no amount of training can erase generations of breeding, so do your research

When you do finally choose a dog please update this thread with your choice & some pics please. As popular as this thread has been I'm sure a lot of us would like to see your final choice (I would).