Our guitarist is considering getting a half-stack. He played through my Little Mark Tube / Peavey Tour 410 and loved the way his sound didn't get "flattened" as he turned up the volume. It sounded nice. Can someone recommend an amp for guitar which is similar to the little mark's (LMII, LMIII, LMTube) sound, which I would describe as transparent, clean, fast, and powerful. He wants to avoid tubes. I'm not seeing too much in my searches for a small, powerful, solid state guitar amp that would perform similar to my LMTube. Any suggestions?