what is your price range? I recently bought the yamaha RX-V596 for 350 from crazyeddie.com, it can drive my klf 10's easily, You could get the 496 for 275, which should be able to effortlessly drive the sf-1s (the only difference beetween the 496 and 596 are the 496 is its 70 wpc instead of 100 which is conservatively rated)