This model is apparently available at my local Sam's Club, but it wasn't on display when I was there the other day. I'm not sure if they would hook one up and allow me to test it out.
I have to admit it's sort of confusing to try and choose between SEVEN different 40" Samsung models - B500, B540, B550, B610, B630, B640, and B650. As far as I can determine, the B610 and B640 are exclusive to Sam's and BB, respectively, which makes me a bit suspicious of their specs. The B650 isn't a possibility, unfortunately, since it's not available in my area and I wouldn't want to buy a TV online. To be honest, I would be satisfied with a B550 if I could just find one with a reasonable level of clouding. I'm sort of skeptical of that happening, though, since I already got two with bad clouding. I doubt BB would be willing to do another exchange anyway, so I'm probably better off getting a refund and stepping up to a higher end model.