Can't comment on the upgrade but you'd be surprised at the improvement that can be brought about to an Aries by using either a Seismic Sink or a Big Rock/Air Mass combination under the unit. The differences are nowhere close to being subtle.
I have the 10.5 and never had a chance to compare directly with the 10.0 I do know that Weisfeld used a 12.5 on his new TNT V at the NYC Expo (sounded terrible but then again, it was a tiny little hotel room). As for phono cables, I like Nordost but that's probably because I have a tube phono stage (EAR) and Classe electronics.
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