Scarecrow, why not be realistic and just start with the 15# model!
seriously, if you think you truly need it, the boga is the best product going. i bought the 60 right after it was re-released last summer. i beat the crap out of it, and it keeps on going. to show you the durability of the boga, i abused mine for the better part of last year, from using it as a "preist" to taking some spils in the surf with my only cushion being the boga, and it is still less than a few ounce off of a certified scale. that is one quality piece of equipment!