Rega RB-300 Counterweight

I bought the Expressimo Audio Heavy Counterweight for my Rega RB-900 about two years ago, and posted a "rave" review for it, saying that the improvement it made to my turntable/tonearm combo was NOT subtle, and was the most significant "tweak" to my analog system I'd ever experienced. Since that post, the Expressimo Counterweight has been updated. I do not have any experience with any other counterweights, but on the basis on my experience with the Expressimo unit, I enthusiastically endorse it!

If you want to read my full original post, here's the link:
http://forum.audiogon.com/cgi-bin/fr.pl?eanlg&1003547794&openusid&zzSdcampbell&4&5

Use the Michell Technoweight; works great on the rb300 with Audio Note silver wiring.

OK to totally endorse all of them I have heard(owned) the Heavyweight and the Kerry Audio F2 counterweight. I prefer the Kerry model, just my 2cents.

Second the J.A.Michell counterweight. Totally different design and all weight is placed below the center line of the tonearm center horizontal plane. I have it on my RB600 and what a difference it made in detail, base response and clearity

When re-reading al the past posts on this topic, there is a consistent mention of each member's favorite.
My favorite is the Kerry Audio F-2 Titanium Heavyweight Counterweight. If you go back to my many posts about this tweak, it upgrades the analog vinyl listening experience so much that the praise seems impossible to believe. But, the praise is pretty much repeated by all owners, and by reviewers who get a number of companies to lend product for comparative testing.