have crate BT100 1x15 spkr 100w combo amp 70 lbs--i want to travel lighter for club gigs. I know the 2 x 10 spkr config is popular...do the smaller speakers really put out a decent bass sound compared to a 15" spkr? Do you like the Carvin MB210? I thought I might start with it, and could always add the 210 ext cab later... Is Carvin a dependable brand?? Thanks for your input.