i agree with all the posters that are saying to get a computer that works in gauge mode. I have a shearwater pursuit and use it as a bottom timer with tables. In my opinion, it was a waste of money for my needs. I could use it to it potential, but like tables more.
As far as a BP/W go, I would check out caveadventurers.com and see what kind of deals they have going on right now. I personally dive a ss plate with hog harness for my heavy doubles (LP108s) and an al transplate for my AL80 doubles. The BP/W is very versitile. I have also used mine with out a single tank adapter and it dove fine.
I would buy a singles wing for now and then later on buy a doubles wing if you want to go that route. I have the rec wing which is for singles and doubles, but it can be a pain to get used to.
as far as regs, I would buy those if it was between them and a computer. Keep and eye out on here for the classifeds and at places like decostop and even craigslist. if you buy used, be sure to get it checked out by a reputable business.
if you want to go the tech route in the future, be ready to spend alot of money! more people seem happy diving rec profiles tho
brett