Audiogon'r Slipknot1 made the upgrade from the Scout to Scoutmaster and has been very pleased with the improvements. I've heard his system with both and agree with his assessment.
The new motor/bearing combo in the Scoutmaster is SO much quieter. The background is a lot blacker, and the noise floor is much lower. I have noticed, with limited listening thus far, that my system is much more resolving at lower volumes than before. http://forum.audiogon.com/cgi-bin/fr.pl?vevol&1069279142&openfrom&78&4#78If you then add a motor controller, such as the Walker Audio or VPI SDS, the Scoutmaster is very very good. I doubt that you'd be searching for an TT upgrade until much more in your system has changed.