On Ebay, or KEH, you can put together a 645 Pro body (~$100) + a AE Prism (~$150-$175) + a back (~$50). I spoke with Mamiya (MAC in Elsmford NY) recently about a CLA on my Mamiya 6. And they said the still support the Pro and the Pro TL, that they are workhorses. The Super has issues they warned, and that if your looking for a kit, better to look for a Pro or a Pro TL. The lenses are good, I have seen 80mm manual focus go for as little as $50, My personal fave is the 80 f/1.9 - fastest MF lens, and the 110mm is really nice for portraiture, better than the 150mm IMO. I don't have MF Zeiss lenses ( I wish I did) So I can't compare. But MF, even at 645 is a big step up in image quality over 35mm, I think that it's a bit of hairsplitting once your in 120mm format, sure I could be wrong, but basically they are all good at the medium format level. At that price, it's a no brainer, but as someone early mentioned, when you assemble all the modular pieces of a Mamiya 645 system, the little thing gets heavy. It's still lighter and less bulky than a RZ or RB, but it's not light. I think Medium format is the way to go these days, you get superior images to 35mm film, and with the right scanner (Nikon Coolscan 9000 ED) - you can get better image files than any FF 35mm DSLR system. I would go for manual focus, I tried the Mamiya 645AF, and it kept focusing on points in the image that I wasn't trying to - I like off center focus - I like to control my camera, not it control me. So get a Pro, or a Pro TL, but I would argue that they aren't really walkaround camera's. For that, get the Mamiya 6, or the Fuji GA645 or Bronica RF645. Rangefinders are awesome, no clackity-clack mirror box, silent, and the Mamiya 6 was a masterpiece of a camera, they do get snapped on Ebay when they are for sale. My favorite camera, but I still keep a 645 Pro system in my closet. and Just recently, I came across a rare 24mm Fisheye, so I can't wait to try that.