Like ATS says 42psi is about right for that turbo, most aftermarket turbos are in the same 40-45psi range. Any more and the drive pressure starts to cut into your hp
575hp is generous without N20. Possible but it will be hot there. With a common rail I would look into something with atleast a 62mm compressor inducer and 71mm turbine wheel. A CR has no problem daily driving and light towing with 64/71-14s
What I don't like about ATS' turbos is they aren't wastegated. I think every turbo used in a single application should be wastegated. But thats just my opinion.
The A3000 would work good as a secondary in twins and spool awesome. Might work good with your truck now, but once you add some fuel it will be to small