Well thank you all, that was a very informative discussion. I frankly had no idea there were quite so many different options - I mean in a way I knew they existed, but in a way I did not realize how different each medium format solution is! I guess it is the middle format for a reason.
To be completely honest, after reading all this like 3 times, I am tempted to look really good at the 4x5 route for the big stuff. Maybe the best solution would be a 35mm for the quick stuff and 4x5 for the slow stuff. But I will certainly keep this all in mind as I look around and try to handle a few of these bodies and see what they feel like in the hand.
Thank you all very much for your time and sharing your hard earned knowledge!