70lbs is huge. Beyond huge, gagingous. 55lbs will easily float me with hp100 doubles, 2 AL40s and an AL80 in a drysuit.
My advice is to not even get a doubles wing.
With your current experience, the best thing you can spend you money on is a BP/W, a canister light and training. Doubles, huge wings, etc. etc. are all overkill. Hate to break it to you Sunfire85, but you aren't ready for all that carp.
After another ~50 dives, when you are ready for doubles and such, you will then have a good idea of what kind of wing you need. You said below that you'd like lift low. Almost everyone I know what's lift high, to avoid plowing sand with their forehead. I posit that you don't really know where you need lift.
So get more experience in a single tank BP wing and you'll start to know how your body is in the water. Then you can get a wing to match your shape and skills, instead of trusting either your instructor or the internet. Both are a poor substitute for your own judgement and experience.
My advice is to not even get a doubles wing.
With your current experience, the best thing you can spend you money on is a BP/W, a canister light and training. Doubles, huge wings, etc. etc. are all overkill. Hate to break it to you Sunfire85, but you aren't ready for all that carp.
After another ~50 dives, when you are ready for doubles and such, you will then have a good idea of what kind of wing you need. You said below that you'd like lift low. Almost everyone I know what's lift high, to avoid plowing sand with their forehead. I posit that you don't really know where you need lift.
So get more experience in a single tank BP wing and you'll start to know how your body is in the water. Then you can get a wing to match your shape and skills, instead of trusting either your instructor or the internet. Both are a poor substitute for your own judgement and experience.