Well the best is probably the Durand record weight which weighs 550g, but costs $3500US! I also like the Combak TU-812MX “Million” Maestro Analog Record Clamp which weighs 360g, but again not cheap ($3kUS). I own a few Stillpoints Ultra LPI’s which Roy Gregory raved about. The LPI weighs 680g & are a lot cheaper ($550).