+1 on Origin Live. I had the same upgrades to an RB300 as you, but upgrading to an OL Encounter was a revelation. Vastly superior. Have since moved up to an OL Conqueror, and really have no further urge to change arms.
Tone arm upgrade
I'm currently using a Rega RB300 modded tonearm ( aftermarket wiring harness and counterweight). I'd like to consider a step up, have been keeping my eye open for a good condition used Linn Itok arm. Is this the right path or in the $1~$2k price range is I there another good alternative?