Here are some other Sampletekk staples I mentioned in the VI Control thread:
Rain Piano is quite special, even Mk1. Check out Vertikal Mk2 for another great upright.
Also, if you're into using mono pianos in your compositions, have a look at Singular. That one's singular indeed
I personally dig the INIL Choir a lot, and even BOB Brass is interesting, as are the Renaissance Flutes. Tubed Keys Mk1 73 is a fine Rhodes.
By the way, TVBO includes both 7CG Mk2 and TBO Mk2. Not to be missed. And WG2 MkII of course.