Very cool system, glad to find someone that has HT with Magnepans mixed with another speaker and has found one that matches well - will pass this on to my brother who has been vexed by this problem. Beautiful deck and view also!
I've had my 1.7i's for about half a year. If you can put them on Mye stands or Sound Anchors, it might focus your imaging even more - especially for two-channel. If you heard a difference when upgrading the tweeter jumper cable, you will probably notice better stands.
Thanks for including that detail about the LG OLED. I have a Pioneer Kuro, and will eventually be getting a new flat panel display myself.