Nothing wrong with going big on the upgrades. Me personnally, I'd go with the Levinson over the Bryston, especially if you are looking at the 532H amp. Keep in mind that you may not hear much or any improvement until you upgrade the Adcom amp. I would expect that the Ortofon Blue cartridge will show it's limitations very quickly after upgrading both the Preamp and Amp.
Good luck and let the music play!