André,
It really depends on what you intend to do with the camera. I have used and liked the new seagull TLRs, but have no long term knowledge of it. I have also used rolleicord and Lipca TLRs, and out of the 3, I'd rather shoot the seagull (btw, all were 3 element lens types).
I own a Pentacon Six 6x6 SLR, and like it quite a bit. It does have a broken frame counter, tons of internal flare, and extremely wide frame spacing, but when I press the button, the shutter fires. In the end, that's all I care about. Once you figure in that line of though with the fact that I only use 80mm lenses, I'd probably be just as happy with a new 4 element seagull TLR (which would have a brighter screen, less internal flare, and correct spacing, if all went well). JandC used to have them at a very good price, but I can't find them anymore...
BTW with a name like André Ferreira, I have to ask: Are you from Portugal or Brasil?
