Best speaker 3k to 4k used?

Never heard this combination but why not consider Martin Logan? They sound quite good with Krells,may do even better with Gryphons.The choice of dynamic speakers is endless.Just make sure to keep your S100/Tabu combo,no speakers in this price range are worth replacing them.

For $2500-2700, you can get a pair of Vandersteen 3A Signatures, which compete very well against speakers costing twice their MSRP ($3500). Before you make a purchase, you would be well served to audition the 3A Sig's.

I would think you'd be hard pressed to find a better used speaker than the Aerial 10T. Sonics, appearance, and fit'n finish are second to none for anything near the price range you mention.

However, a high-powered amp is pretty much a requirement for the 10T. I'm now on my forth or fifth amp in the last two years and I am more than impressed with the full range sonics of the 10T.

-IME

Try soliloquy 6.5. Agree with the Martin Logan suggestion as well. Avoid speakers from companies going out of business. Also Silverline does not extend warranty to second owner, had bad experience with the finish and no viable recourse. Best bet is to get warranty coverage.

Von Schweikert VR 4.5's