I have a Bronica ETRSi, it is my first dip into medium format. Mine has a metered prism viewfinder which, in operation, makes it quite like a 35mm SLR. Mine was in VGC and came with the 75mm Zenzanon F2.8 lens and side winder grip. I paid €480 and I've loved every second of it and can fully recommend. It shoots 6 x 4.5 which means you get the most exposures out of a roll of 120 film.
Cheaper options include older twin lens designs such as Rolleiflex models, which can be had for much less and can still produce stunning results. I don't have experience with these but they are more stripped back and rudimentary in their design and operation from what I gather.