I would not discount the advantages of the stainless steel plate. Warm water diving usually means you will be diving alu80’s. A SS plate weighs in at around 5 pounds, this will nicely offset the 4 lbs of positive buoyancy of the aluminum tank. This also places the weight in an ideal spot over your lungs. When comparing quality, you really need to break the system down into the individual parts. The backplate, STA, and other assorted hardware will last until the next ice age, there really is nothing to break as it’s all made out of stainless steel. The webbing will last at least a couple thousand dives, when it finally wears out or it “shrinks
”, it will cost you under $20 to replace it. Any metal cam band with a metal buckle will last for thousands of dives. That leaves the wing; any reputable brand should be fine. I would go as far as to say the Taiwan OEM built wings are as good as anything out there. So I would say go with the best value, in the water you won’t be able to tell the difference between any of them.