I used to always also this question with YashicaMat TLR (a great camera, by all accounts). But now that prices have gotten so low, I've started saying a Bronica SQ-A with a 80mm lens and a waist level finder is a better entry point. It is easier to focus than any TLR for those of us with (slightly) dimming eyes and can be expanded as far as you might ever want to go. The main thing is that any step to MF, in my opinion, should include composing on ground glass. The world just looks more interesting there.
The OP indeed has many camera choices. The Bronicas are pretty reasonably priced. The real issue now is developing. They are very lucky to have a lab that processes 120/220 film. I would suggest the OP gets the stuff needed to develop and scan film if they have problems with their lab or they have creative needs or volumes that can't be cost effectively met by their lab. for B&W developing, it should be <$100 for a changing bag, used paterson reels/tank and some chemicals.
Have to agree with CGW. First I love my rb67. It's the second one I've owned, and I absolutely love everything about the big beast. No, it's not the lightest out there, but at 58, I can still handle it just fine. Strictly a mechanical camera, so you don't worry about any batteries. The lenses have wonderful contrast, and are tack sharp. And due to the rack, and pinion focusing,and the built in bellows you can get to about 9 inches with out any extension tubes. Macro work with a 6x7 negative is amazing. I too have been lucky on ebay, I have found reliable dealers, and gotten great prices. There are some good prices on the cameras, and quite a few deals on the fine Sekor glass. The only thing that seems to remain on the high $$ side are the film backs. One other thing, the leaf shutter (in each lens) allows the easy use of fill flash for out door portraits. Take your time building you kit if you go RB. Start off with the camera, and prime lens. Usually a 127mm. I would also suggest the Mamiya grip, as it does make it easier to work with, but you can work without it. Good luck, and wellcome tothe MF world.
Where do Ponds get their money from these days? Digital prints... It is still more cost effective to have them print for you than doing it at home. They don't make much on developing of film but if you want poster sized prints, canvas, etc. then they do a great job. The big money was always in the prints.
Buy what ever appeals to you! Personally I like a SLR with a viewfinder and a prism. Currently own Kiev 60's and Mamiya 645's. I love both but you need to be aware of the problems with used camera's. Light seals and interior flocking seem to go on a camera that has age on it. Then how about a CLA? I would buy from a dealer that will stand behind the equipment. Maybe he does not work on the stuff but you have the option of returning the camera or lens. I you are handy then this is not a problem! Reflocking and seals not that difficult. With some tools and manuals performing a CLA can be done! Steven.
I've recently picked up a Super Richoflex TLR and am please with the results produced. Worth a look as you are looking. Make sure the shutter release is working. Many sellers are clueless as to how to cock and release the shutter. Push the release one way to cock it and the opposit direction to release it. Pretty neat little cameras with decent optics. Bill Barber
Silvano's doesn't have any Fujifilm over 400 ISO that I can see :-( My foray into the dark side has made me like high ISO for action shooting...