Isobaric cabs are ********. The limit of a bass speaker's output is the excursion of the speaker. Isobaric configurations double the power handling of the electrical circuit, but don't improve efficiency or add excursion capability. The speakers simply can't move any father than one can on its own, but both are combining their force on each other. They simply can't make more sound than one on its own, and if you give them double the power of a single speaker, you fry both speakers from excursion damage.
Otherwise Orange cabs sound great, but rather heavy. I hate Ampeg cabs, you'd probably be fine with the 7Pro and a single SWR 4x10.
SVP-CL + IPR 1600 + SWR Goliath III 4x10 = bliss