The Minolta Autocord (any of them) is an awesome value in TLR's - the image quality (in my opinion) is better than the Yashica 124, and gives the Rolleiflexes a real run for their money. The latest CDS metered versions are incredibly accurate with a 9 degree spot meter. I had a CDSIII, the last Autocord produced and got some great shots from it, until I sold it :bang:
The great thing about TLRs is they're light, and with only the small movement of a leaf shutter you can get great results at slow speeds in low light. Except for the heavy Mamiya C330 and its ancestors the lenses are fixed and you're relegated to expensive and hard to find accessories if the 'normal' perspective isn't your thing.
If you're not looking to spend a fortune, I'd stay away from the Rolleiflexes, there's a real collectors market for them and the Yashicas and Minoltas are a much better value, likely to be in better shape and with better lens coatings.
I recently picked up a Mamiya 645 1000s with a 80/1.9 for next to nothing from Adorama. It had a pretty good coating of grime and dust and the light seals were pretty goopy, but the body and lens cleaned up to near perfect condition and Adorama took care of the seals for free. The lens is the fastest in medium format and has a very pleasing look wide open. The build and optics of all the lenses are of great quality, are abundant on the used market and dirt cheap. It seems studio photogs are dropping these in huge quantities for digital; Places like Adorama are having a huge problem moving their inventory, hence the great prices.
For available light, hand-holdability with slow speeds might be better than a fast lens - the DOF of the 80/1.9 is less than an inch wide open and close up, so the TLR might suit you more. If a selection of lenses and finders is important, you may want to look at the Mamiya.
