hey everyone. i'm thinking of adding a 15 or 18 to my rig. (walkabout-ashdown mag410) i can't spend too much. i have been looking at steelsound. they seem to have some good deals there. i'm not really concerned w/ brand names or super duper studio tone, i just want to feel a little more thump and run @4 ohms. would one of these cabs loaded w/ a madison be a waste of time?? thx for the help..