Rockingest speakers I've heard (don't own) in a long time were the GR Research open baffle Super-V. Powered integrated sub and co-axial high eff woofer/tweeter. 97 dB. Easily made >100 dB @ RMAF driven by dodd tube amp w 2 el-84s a side; maybe 18 wpc. Incredible boogie factor w stomach-churning bass (IIRC, 375 wpc, dual internal powered subs/side). The Mccormack is a great amp and w 10x the power should easily produce concert level spls in a room that is probably 3-4x the volume. Cost of the complete kit is $2500 and since its not a box speaker, you should be able to get a local woodshop to make them the "cabinet" and stay well under budget. Maybe go for the platinum upgrade for the McCormack, or sell it and get a higher powered pp tube amp than the Dodd. You WILL be rockin'