I have a SWR SM400 and a SWR Triad speaker cab, which has a 15", 10" and a horn. If I was to add a 4 times 10" cabinet, would I notice a big difference in sound and volume? If so I can't afford SWR or anything of that price at the moment. Would it be worth getting a cheaper brand? (any recommendations) possibly Hartke or Peavey or waiting until I can afford better.