i guess i misunderstood what you're looking for in a board. having spend considerable time on both the loadeds and bcs that you've mentioned, i'd highly recommend the bc. you'll regret spending the extra money on a loaded. trust me. i know very few kids who ride longboards seriously and don't regret buying a loaded board (at least over a cheaper deck).
also, seriously consider your wheel choice. i find that wheels and bushings are just as important as your deck, and they tend to be much less expensive. and please don't buy brotangs, they are highly overrated. my 81a dregs slide much better than my friend's 86a fat frees. their formula just sucks. the 86a chatter more than they slide, the 83a wear down to nothing in a matter of days, and the 80a are simply garbage for a number of reasons.
sorry to keep writing essays, but i spend the entire winter reading about longboarding shit and the entire spring riding as many different boards as i could, and i'm using this thread as an outlet to justify my obsessive behavior. check out muirskate.com if you haven't already. all the dudes there are super nice, and if you give them a call they'll definitely set you up on the right board.