I mostly play classic rock and heavy metal, and i wonder which 2x12 cabinet ( open or closed ) would be great for that amp ? speakers suggestions/combinations ? i have Vintage brand les paul copy of Gibson modified with SH5 Custom in bridge and Pearly Gates on neck, and that's one of my favorite guitar now. i heard JCM 800 can be bright, so which speakers should i put in 2x12 cab to sound full and not too much bright ?