why not keep your current regs and just buy new first stages and hoses? Swap the second stages back and forth?
note that quality issues not mean recalls, quality issues don't mean poor function, though go read up on the 500SE and you'll get quite a few interesting reports on that piece of junk.
Their normal second stages are fine, their normal first stages are fine. They are $700-$800 regulators in the same run as HOG, Dive Rite, etc. They are not $1500 regulators in the same league as someone like Atomic and Poseidon. Apeks is horrifically overpriced as well for what they are. Great regs, but way overpriced. The XTX second stages are very heavy as well btw, so I'd ignore that if you have tried putting the hose behind your neck and it was still a problem