Speaker Upgrade Suggestion

I'm in the process of evaluating a speaker upgrade to my system. System config is: Blue Circle 21.1 preamp, Outlaw 950 pre/pro (for HT and multi-channel music), Marantz DV 8300 uni-player, Rotel RCD 1070 cdp, Anthem MCA 20 (l/r mains) and MCA 30 (center and surrounds)with Kimber PBJ interconnects. Current speakers are Monitor Audio Silver S10's (mains), S2's (surrounds) and LCR (center) with SVS sub. I am finding myself listening in 2 channel mode more and more. I am considering adding a seperate DAC (Musical Fidelity A3.24 or Bel Canto) and upgrading my mains. The budget for the mains is $4,000. I like a crisp, tight, detailed and open sound with tight bass. I've listened to the following speakers: Thiel 2.4 and 3.6 (too dark), B&W N803 and N804 (kinda crackly, 804 seemed better than 803), Magnepan 1.6 (nice sound, lacked detail), Klipsch RF-7 (great detail but cold).

My MA's are good sounding but I'm thinking there's a more "musical" product out there.

Suggestions wanted please.