I have a Genz Benz Shuttle 6.0 12T (combo with 12 inch cab), and am looking for an extension cab so I can experience the full 600w at our next gig. Unfortunately, GB discontinued the match to the cab I have, and all their other products are out of my budget. Could anyone recommend a good substitute for no more than $500? Also, would 2 10's sound good in combination with my 12 or should I just be looking for something similar to what I have? Any opinions/advice would be greatly appreciated.