To get the wide deep soundstage I would get an ARC VT-100.
I'm using a ARC VT-60 on my Martin Logan Quest Z's and have them biwired with great sucess.If u don't have provision for biwire on the SL-3's then you would need to move up to the ARC VT-100.With the tube ARC, its been my experience over the years that they mate perfectly with Martin Logan's.
S.S. Gear makes Martin Logan's to analytical,cold,with lack of soundstage expansion.Your ticket IMO is a ARC AMP.
I'm using a ARC VT-60 on my Martin Logan Quest Z's and have them biwired with great sucess.If u don't have provision for biwire on the SL-3's then you would need to move up to the ARC VT-100.With the tube ARC, its been my experience over the years that they mate perfectly with Martin Logan's.
S.S. Gear makes Martin Logan's to analytical,cold,with lack of soundstage expansion.Your ticket IMO is a ARC AMP.