Your table sounds great; it has been a while since I have heard a black widow and I am always a fan of the Shure, what a combination for that table. I always appreciated that nice full, round, detailed sound with that black background that the modified AR's always had. I have one in the basement that I did some of the Merrill mods to; for anyone not exposed to a modded AR they have a real sweet fat tone that is unique to that table; issat so Russell? I guess thats why Linn copied the AR. When I hear some of the big end stuff that resolves like crazy, I still don't think they can do music as well as the AR/Linn/ Thorens TD 160 super, tables.
Did you do the springs and sub-platter? What motor are you using or looking to get? And power supply; have you considered making one for the table? And is your stock motor the A.W. Haydon?