"If you want to get really over the top, run 2 8x10 stacked horizontally to give yourself a massive de facto 16x10 set up"
You can already guess that this has crossed my mind
" Phasing issues could make the sound or tone to vary markedly from venue to venue or depending on where you stand on the stage"
This is what concerns me and is what I though might be the case. Although they would be side by side with the amp on the smaller cab.