I'm using a Mesa Strategy 400 ( which is soon to be retubed with 4 JJ ECC83's, 8 6L6GC's, and 4 KT88's as per Bob@Eurotube's recommendation ) so I'm limited to about 400 in the wattage department. I need two very efficient cabs that are deep and warm sounding... hi-fi is no longer important. I'd like to keep the cabs small, compact, and light... but that's not a necessity. However, I would prefer small and heavy over large and light. What I was thinking of doing was getting some sort of combination of 4x8" and/or 4x10" cabs. Which would be the best for a very warm, deep, and tubey sound? Remember, high output is VERY important: 2 4x10"s 2 4x8"s or 1 4x10 and 1 4x8" Each with a tweeter for the highs of course... I'm not going to bother with the midrange driver. I'd rather go with something that'd look nice stacked, but tone is my #1 priority.