Its always easy to start from brands up, you can take RBK and Adidas out because of your demand for cushioning.
RBK doesn't have good forefoot cushioning as mentioned in Issue 18 of Sole Collector in their review of the RBK Unanimous, I think unless you can find an RBK shoe with full-length cushioning.
Adidas' adiprene+ doesn't last long as far as i can recall and adiprene in the heel isn't as responsive as zoom air.
However a3 and the bounce technology is always something to choose from, but those two technologies don't sound like it would fit your style of play.
Now for your flat feet, you need to give Superfeet Insoles a try and see if they work for you (try for like 1-2 months), and if it still doesn't work, go see a foot specialist and see if they recommend that you get a custom insole made for yourself.
Going back to shoes you would want to choose, I would highly recommend the Zoom BBs, you can also go checkout goosebear10's blog:
http://undsed.blogspot.com
It has tons of shoes that I think would fit your style of play, but I would stay away from shoes like ZKII and Lebron IVs just because they have insoles that either are unremovable or shouldn't be removed, unless you got a custom insole thats thin enough to go on top of the original insole. Nike Air Ultraflight is another shoe thats similar to Zoom BB and should be given a try but its pretty old so you have a better chance at finding the Zoom BBs instead
Anybody willing to ID Kobe II, and then send them to Canada?, PM me for fee