I loved the F3 since the day it was introduced.(got 3 myself 2 HPs and a DE-2) Some are put off by its size and heft. But that is part of what I like, with a long lens a heavier body is more stable.
Size wise seems down right compact when you spend time shooting with a DSLR like a D300.
(the HP finder is not really a necessity, I prefer the smaller and more view finder coverage of the DE-2.If you shoot with sunglasses you are an idiot, if you wear correction lenses you could use diopters)
But I think you'll like the F3.