Check out the Karan Acoustics Amplifers from Yugoslavia.You will be amazed.I feel that some of the better solid state amps come from overseas.Avatar Audio in Miami florida is the importer.The products are on display now at CES.I like the rest of your system.I see you use your Wadia as a controller.Karan also do a Preamplifer,but i guess the Wadia will do the trick.You will have to compare.I dont think the Krell is in the same class as the Karan.
Cheers.