Plustek's 120-capable scanner is the OpticFilm 120, which does a nice job for me but is $2k, more than I think you're hoping to spend. Still, as far as machines in the sub-$10k class, it's the best one still in production.
In the sub-$1000 range, it's pretty much the Epson V800 if you want medium format. They do a very good job - noticeably less sharp than the Plustek only if you look at individual pixels at 2400 dpi or above. The Epson will have a little less contrast (or a little more flare) as well. But its price/performance is as good as you can get with currently-produced machines.