Probably a good idea to do a Google search. This question comes up quite frequently.

Search for Vanity, HD621 etc.

In terms of recommendations, you are running a digital system, so the 3 version is going to be fine. I use a 93, the latest version is the 103. Im very pleased with mine, but I use it for Bluray and DVD playback. As a music spinner, Im less convinced. I have never owned a G98, but by all accounts were good performers in their day.

Cheers
Greg

M owner since '97