This may be a dumb question... but i thought i'd ask anyway since i'm curious. I KNOW amps+cabs perform fine when they are mixed and matched (mine are ALL different). But, i was wondering if there are benifits to pairing like makes (i.e. - ampeg head+ampeg cab), and further more... like models (i.e. - i have an ampeg b25b 2x15, would there be a noticable difference if i had a B25 head attached?). Thanks!