Congratulations on the upgrade. Please elaborate on what you're missing. Are you looking for something specific or do you have an image of a reference system in mind? My limited experience has led me to believe that there aren't many specialized calibration specialists, mostly because customers aren't always willing to pay for their calibration services. Hence, at best, you can expect installers to simply perform a basic Audessey calibration, which is likely what your installation has already done. Someone in our friend circle used to spend days calibrating setups utilizing REW, calibrated microphones, speaker positioning, etc. for a fee of 35K. Since people were reluctant to pay, so he relocated to Houston and minting money there.
Once you explain the issues, forum members should be able to guide you in the right direction.