hi, i'm interested in adding a second cabinet to my rig for playing live, competing w/ a guitarist running a 200 watt marshall into two 4x12's and a drummer w/ his own pa. i'm currently using an swr sm500 bridged into an swr big bertha 2x15 cabinet. i want to add volume, and may be changing heads to something around 1000 watts. i've considered either a single swr 1x18, or a 6x10, or a 4x10....i'm not sure. i play heavy rock/alt rock mostly, slap occasionally but its fingerstyle for the most part. any ideas would be appreciated.