preamp for JEff Rowland 201 monoblocks

I just bought a set of 201's and I am looking for suggestions on preamps. They will be run on a set of old school JBL CF150's. I am hoping to keep this conversation in the solid state side as I currently have a Mcintosh C2300 to try that route on although that piece will stay on that system along with the Sonus Faber Cremona M.