Very nice system.
I recommend that you try to Revel Studio Speakers (which I own) or the Wilson Sophias.
Our systems are similar, in as that as I have the ARC LS-2 and ARC PH-3, and a Levinson No. 23 amp with a Sony 9000ES.
(I have the Basis 1400 TT, w/RB300 and shortly to be a Basis 2001 w/RB900. I use the Koetsu Black cartridge.)
Good Luck in your speaker search.