Ben: i didnt mean that i thought i would be overweighted, just over-trimmed a little too much - nose heavy with all but 2# on my waist in freshwater (total of 8#). In saltwater i was thinking it would be to my benefit to have about 40% on my back and 60% on my belt, but 75% back 25% belt sounds a little too much. I have heard that cavers dont really bother carrying ditchable weight - most of it is in the form of the BP or tanks (main plus stages) - in that case extra weight wouldnt be advisable, but if you get in trouble, you could always ditch the spare tanks if you wanted to lose weight. I guess the reason i was thinking about ditchable weight comes from the OW training, whilst not advisable (last resort) at depth i would have thought even having some potential to remove would be better than having none. The other point as above is about where that weight (ditch or non) is distributed. As for the Zeagle/Dive-Rite(+Apeks) thing, i know i can get a good deal with either LDS, i am more "affiliated" with one and that is why i was still contemplating the Zeagle BP/Wings combos.
Chuck: I look forward to hearing what you think about the transpac w/trek. One day i will probably get into doubles, havent the money nor training to do anything really with them at the mo! Also i know i will need more lift in the future to offset the extra weight required for drysuiting up north - but that is in a while!
Fred: I didnt realise Rick (GDI) was that involved in it all, i just thought he knew the guy and had loads of gear from the range of diving he does. I will word up an email to him in the near future, i have a few weeks before i even get out to try one of these babies out - so more than enough time to get the background research done!! I feel bad as i still havent given him a definitive answer on his offer of instruction yet - nor the other two places i am considering (both LDS's that i am choosing over buying these items from) - what to build a good rapport up with at least one of these LDS's thru trips/instruction/sales whilst i am still around here - although the Dive-Rite/Apeks one i havent had much dealing with yet gave me a great deal without much haggling.
Decisions, decisions.... thanks for all the advice so far though, will keep pondering and trying to put something together.