Derrick,

I have tinkered aroung with 35mm and medium format and have recently purchased a 4X5 monorail. I am a roadside photographer therefore I can get away with my very heavy outfit. If I were to pick a camera to meet your needs I would go with a Fuji 6X7 rangefinder with a 90mm lens. The only way that you will know that you have a camera at all is the tripod. This will give you very good results with a 50 iso film. If you are big on the zone system (or want to be) or want to work with movements and are in alot better shape than I am I would go with any of the modern field cameras and a Apo Sironar N 150mm f/5.6. My entire outfit cost less than half the price of the lens but I am very good at spending other peoples money. The price tag on my suggestions are $1300 for the fuji (new) and about $2500 to $3000 for the field camera and lens (new).