I had the xm200 - then got the ext cab to go with it - for a total of 2 15's. Then my dealer got the xm200t in - told me to take it home and try it - and to be honest it KILLS with the ext cab !! I thought the 1/15 was nice - but running 2/10 and 1/15 is really sweet. So I traded the xm200 back in on the xm200t. Now - I'm gasing for the xc808 and 800 watt head !!