Solid state amplifier $2K Used or New

System B&W Nautilus 805
Audio Electronics AE-1 Preamp
Meridian 506.20 Cd Player
Synergistic Research Cabling

Looking at possiby Krell KSA50S, Krell KSA100S, Ayre V-3, BAT VK200, McCormack DNA 125, NAD S200
Any other suggestions?