Here are my gear requests. I may get onto renting them and sampling them myself....but I am sure other have better converters.
My main request is the Helios type 69 mic pre and eq. Also the N**e 1084. LA2A and 1176 hi kernal distortion (if compression is not ready). Ampex Ag440 or equivalent MM1000 (used in almost all classic rock with a meaty transformer/tape sound)
While we're still waiting for the full compressor implementation, one of those listed (1176) is available, it's part of the Retro Studio package from CDSoundmaster. In fact there are a couple of 1176s, a Fairchild, and a few others. Not compressor programs, of course, but high kernel programs (I find them pretty useful actually).
+1 on the Ampex, I would happily buy an addon to the R2R if it included more machines that included that.