What don't you like about the integrated Octo's? I have a standard octo but when I finally bought my own BC last month (Aeris Atmos XT) I went with Aeris's integrated air, the Air Link.spectrum:AIR-2, well I hear you there. At least you can solve that one fairly cheap for about $125. Meanwhile drill with what you have and make your buddies aware of what to expect.
I've use my standared octo in an emergency situation in October (guy forgot to turn his air on and figured it out after plumeting to 50') and it worked fine. Keeping that memory in mind, my dive buddy and I practiced with my Air Link system last weekend, she didn't have any issues using my primary and other than not being able to turn my head from side to side very well, (at this point your dive is over so it's not really rellevant) breathing off the airlink was no issue.
Am I missing something unpleasant that I'll discover in the future? It sure was nice to not have one more hosed thing hanging off of me.