I love my 45# wing... Great trim, and control underwater, inverted, rolling, etc... great control...
The 70# wing gives me a little more lift than my DR classic, and thats what I needed for the start of a dive...
I would say, for single tank stuff in warm water, go with the 30# wing. You wont need the gusset in the 45# wing. If you are diving in colder water with a drysuit, and steel singles, then I say go with the 45# wing.
Good Luck...
The 70# wing gives me a little more lift than my DR classic, and thats what I needed for the start of a dive...
I would say, for single tank stuff in warm water, go with the 30# wing. You wont need the gusset in the 45# wing. If you are diving in colder water with a drysuit, and steel singles, then I say go with the 45# wing.
Good Luck...