my dilemma...$$$ vs power. I currently have an iamp 600, and a 4 ohms Avatar B212 (1000 watts) that I will keep for smaller/medium shows. I was thinking of getting another Avatar 4 ohms and a 2 ohms amp with higher wattage for the bigger shows I will be playing soon. I'm more into the idea of stacking for versatility and lugging...I don't want a fridge. Would it be better overall to just buy 2 8 ohms and power them thru a higher wattage amp as a 4ohms load? Because I'd hate to have to spend more money on buying 2 cabs and an amp instead of just one additional cab+amp. I also have a Sansamp RBI to use as a preamp and am wondering how most of you use a preamp with a head...run through effects loop...or using the input, (if featured on your amp) bypassing the exsisting preamp? I am very inexperienced with the whole bigger rig, preamp/poweramp thing. I wouldn't even know when a compressor would need to come into the picture. Any reqs...including specific gear? I just don't hear too much about people using 2 ohms amps. Thanks!