Thanks for your reply.
Since the Kemper Kab will be closed back, wouldn't you expect better performance (given a choice for your own cab) to use a closed back cab?
It's more of a personal preference thing. A closed cabinet will give more bass, but that may not be desired. Raising a closed cabinet off the ground will lose bass which might be comparable to an open cabinet on the ground.
Some players like the open sound of an open cab. Metal players would probably prefer a closed cabinet.