FWIW, the other two pres are based on the 1081 and 1084 circuits. I'm in for two 1073s, two 1084s and a couple mics (multipattern LD tube and a tube ribbon). I might also get two 1081s if I have the spare cash when the deal actually goes down. I'll try them out once I get them and then possibly mod them with better transformers and other parts. I picked up a couple SD tubes mics and a double ribbon mic on the last buy. Very decent perfectly usable mics. Not Gefells or Neumanns, but very respectable and at 1/10th the price. At this point, the guy running the buy has experience doing these (two prior successful GBs) and this one will be better organized and automated. The prior posters are right though - as some of these are new, never before heard products -- you gotta gotta have a little faith
