I have to pick out some cabinets for my amp, the Hartke 5000. I think I may go with Avatar, one reason being I'd like to get 4 ohm cabs so I can run each power amp at 250 watts instead of 170 (at 8 ohm). So, my first question is, do I have any options besides Avatar for 4 ohm cabs? Most others seem to be 8 ohm. I think all the Hartke cabs are 8 ohm. My second question is, will I put my amp under serious strain if I run each side at 4 ohms for a normal amount of time at reasonable volume? I have a nice Hartke rack bag I'd like to put the amp in, but I'm afraid it will act as like a thermal covering and cause the amp to overheat. ??? Thirdly, I need some advice on picking a flexible cabinet configuration. My thought is to go with a 1x15 with a horn, and a 2x10. Then I'll have 2 full range cabs that I can use seperately if I want. I can use the 2x10 @ 250 watts for smaller situations, the 1x15 @250 watts for bigger situations, and both cabs together @ the full 500 watts for really big situations. Does this sound like a good plan? I thought of going with a mini-rig type thing since Avatar has those nice compact cabs, but then I thought that might lack projection in ceratin situations. ??? Any advice appreciated...sorry if I sound stupid about this stuff, but I kinda am!