Just to get it out there, I'm not very savy when it comes to amps, so bear with me. I want to eventually buy and ashdown mag 410 and a mag 115 but I'm not sure what head to get. Brand does not concern me too much just as long as it's cheap. I'll will be purchasing the 410 first and I currently own a GK backline 250 head. Will this be enough? And would it be possibe to combine the two? Thanks!