Whichever version uses a continuous run of wire from the cartridge clips to the RCA termination. Audio Note offers a rewired RB250 called the ARM1. The ARM2 is a rb300 with pure silver wire. The Audio Note versions are wired at Rega with wire supplied by Audio Note is my information. Many of the others are stock Rega arms that have been taken apart, the stock stuff removed, and upgraded wiring installed.
I think the Brit Audio uses the Incognito which is a continuous run to the RCA termination ala Audio Note.
I use the Michell Technoweight with excellent results on my rb300 (audio note version). The Kerry unit is also quite popular. The Michell provides two different weights for different weights of cartridges and this is quite useful.
I prefer a rb300 (to the 250) with the VTF spring removed; the Michell Technoweight provides for static balancing and setting of VTF by rotating the counterweight. It works very nicely.
I think the Brit Audio uses the Incognito which is a continuous run to the RCA termination ala Audio Note.
I use the Michell Technoweight with excellent results on my rb300 (audio note version). The Kerry unit is also quite popular. The Michell provides two different weights for different weights of cartridges and this is quite useful.
I prefer a rb300 (to the 250) with the VTF spring removed; the Michell Technoweight provides for static balancing and setting of VTF by rotating the counterweight. It works very nicely.