I would put ScubaPro in the same class as Zeagle or Atomic or Apeks, as far as regs go.
As far as back-inflation B/Cs, Zeagles are superior to ScubaPro, in my opinion.
As far as backplates go, Deep Sea Supply has the best, with Oxycheq trying to catch up.
As far as wings alone go, Oxycheq has the best, with DSS in close second place.
I have 5 ScubaPro Mk 20s (which are now superseded by the Mk 25s), 6 ScubaPro S600s, 2 ScubaPro Mk 2s, 2 DSS plates, 3 Oxycheq wings (50 lb, 40 lb, and 18 lb), and a Zeagle trilam drysuit remanufactured by Diving Concepts (new boots, new seals, new cargo pockets).
I would not get all of the above from ScubaPro, only the regs. ScubaPro gives you free parts for life, on these. I don't know of anyone else that does.