What's wrong Hasselblad?
The price (;Funny, I actually just got a Mamiya RB67 Pro-S a couple of weeks ago, basically the kind you're referring to with the bellows focusing. You can always look for a Mimiya 645 (6x4.5cm) which I believe focusing at the lens, although it has a focal plane shutter rather than a leaf shutter like the RB/RZ series has.
The Bronica style 6x6 TLR looks nice too. An advantage to those is that there's no mirror swing, you just hit the button and the shutter triggers. I will say, the RB67 is quite a heavy camera, especially compared to a modern DSLR with anything other than a super-zoom on it. The waist-level viewfinder is great, and unless you're doing real hurried street photography, accounting for the light fall-off and using the knob to focus is not a problem. Once I get a good neck strap and the adjustable grip, I might just try out some street photography with it, but until then I'll mostly just be on a tripod.
how much of an effect does it have?
if it was like losing two stops when fousing at 7 meters id probably steer away, how much of a nucinece would you say it is?
If I recall correctly, there's a small guide on the side of the RB67 which depends in part on the lens used, and the distance to subject (aka how much extension). If I'm remembering right, the compensation is 0.5-1 EV, I don't think it's more than that. Through experience I'll probably learn to compensate properly, and more fine grained, but if you're anywhere beyond 10-15 feet or so, on the 180mm (medium to long portrait length on the RB67) lens there's almost no extension so no compensation needed.