Room, Decor and acoustics...

Hi folks,
The room decor bug bites me to build wall display similar to the vinyl record stores.

I'm planning to hang 3...4 metal grid pannels that will hold upto 100 records that I would plan to listen in the near future or frequently listening to. The wall is opposite of the listening wall.

My listening position is 6'away from speakers and speakers are 6'away from each other. Their distance to the opposite wall is approximately 10'.

Will I increase echo if I'll be using metal grids (obviously masked with vinyl records right thereafter)? How important is an opposite wall? What should be considered if anything being done there in the listening room? What will be the alternate suggestions from the metal grid pannels?

THANKS!