I've got a Fryette Power Station that sounded excellent with my SMS.. it's a reactive load attenuator, post power tube (for your main amp) effects loop, with line in and outs, as well as a mono 50W tube power amp from 2 6L6. I used it as a power amp and it was very clean and loud! Linear, so stays clean all the way up (althought I personally didn't get it past noon for the rooms I used it in) I'm building a Jerry combo with an FYD TRP and Weber Cali and this is definitely my power amp of choice. I have a traditional tube amp too, and it's indispensable tool for getting your tone anywhere albeit speaker volume of course.. About $599 when I bought it, but for what it does it's pretty fantastic. They have a V2 now too, not sure what they did. Rackmount kit was about $60, but it's a must buy to protect it for gigs. Hope that helps!
Gibson ES339 and LP Studio w/ WCR Fillmores, PRS DGT, Gibson 2013 Traditional, Fryette Power Station, Redplate CD2, Steamboat Hemp 100 Speaker