OK, this is my latest idea. I'm going to drive 100 miles to try it this weekend. If anyone has any idea of how this will sound, let me know. Hartke HA5000 head (already have this) 1 Bag End D12-D(4 ohm) 2x12 on one channel 2 Bag End S15-D(8 ohms each) 1x15 on the second channel. Two 12's and 2 15's - I think this should really produce some serious tone and move some air. Plus, it should all fit in the back seat of my car.