Re: Looking for replacement for Anthem MRX 300
I'm not sure if a few bass traps will help. You might want to talk with GIK or one of the other suppliers and get their recommendations. I do have some GIK bass traps but really haven't measured with/without to see what, if any, improvement they provided.
Instead of another set of speakers for HT, maybe some sort of speaker selector if you do get a separate integrated for HT. Or, thinking out loud, a separate 2 channel pre (unamplified) and maybe run it through the Analog ins (with no processing, e.g. pure analog) of your MRX?
* LG OLED65E6P, BenqHT2050A
* Anthem AVM90, Rogue ST100, VTV Pascal 7 ch
* Sierra Towers/Horizon (all ELX RAAL), S2EXv2 surrounds, HTM200SEx4 heights, Rythmik E15HPx2
* VPI Classic 1+ (VTA & Fatboy Gimbal), PE Eagle/RR, VAS NOVA, Soundsmith Paua, Manley Chinook, Bob's Devices SUT, SugarCube 1 mini
* Oppo 203 & 103D, EverSolo DMP-A6
* miniDSP Flex, Audiosensibility & Blue Jeans cables, Symposium & Isoacoustics, GIK
* For RDJ: Anthem MRX720, Sierra LX, Luna Duo v2 center, CXNv2, TBD