Wanted to loop back and update everyone on what I ended up doing. After trading in all the gear I had, I did a lot of auditioning, thanks to my local store. I mostly tried out integrated amps to replace my Peachtree, and boy did that make a difference. I ended up demoing a Hegel H190, Rogue Audio Pharaoh II, Margules ACRH-3, NAD M10 V2 and NAD M33. The Margules, in my system, sounded the best, handily.
I also decided to replace the Elac Discovery with a HiFi Rose RS250A Streamer/DAC. Another huge improvement in sound. The Margules and Hifi Rose marry extremely well with the GoldenEar BRXs, so I think I'll be set for quite a while. If I do upgrade in the future, it'll be speakers first, then probably a dedicated DAC.
Thanks to everyone for their suggestions - I'm very happy with my updated system!