Adam,
Sounds like your hearts in the right place, but if you're wondering about what difference an upgrade would make, go to a Rega dealer, since your NAD is basically a P2, and hear for yourself how meaningful the differences are between a P2, P5 and P7 and any other brands they carry in your price range. Of course, it's not a question of whether differences exist, or even how big they are, but how important they are to you and your enjoyment, and if and when you want to prioritize them. It's as simple as that. Good luck and keep enjoying Hank and the crew!
Sounds like your hearts in the right place, but if you're wondering about what difference an upgrade would make, go to a Rega dealer, since your NAD is basically a P2, and hear for yourself how meaningful the differences are between a P2, P5 and P7 and any other brands they carry in your price range. Of course, it's not a question of whether differences exist, or even how big they are, but how important they are to you and your enjoyment, and if and when you want to prioritize them. It's as simple as that. Good luck and keep enjoying Hank and the crew!