Hifiman originally put these two on sale for Black Friday, but it seems to be a permanent sale now? I’m not sure.
At $2000USD I felt the RE2000 was overpriced and at $1500USD it was slightly overpriced. I used to own the RE2000 gold, and they were a thoroughly enjoyable earphone. At $799USD, the RE2000 are seriously worth consideration if you are looking for earphones in the price range. I prefer them to the Andromeda, but that is more personal preference than a case of better or worse. I posted my thoughts in the thread below.
Supposedly the Silver RE2000 has a slightly different sound signature, in that it has a bit less bass and seems more even sounding overall.
I can’t comment on the RE800, as I have never heard them. Supposedly they are a bit brighter. Best to look for impressions before purchasing.
FWIW, I have ordered a pair of the RE2000 silver. I’m hoping they really do encapsulate the RE2000 gold sound, at a $799USD price point. I will report back!