I've had some trouble finding threads here that address specific rack systems. Middle Atlantic seems seems expensive. What do you use in your systems? I'd like something to build into a wall niche. It doesn't necessarily need to slide out, I'd have access to the back. I'd have Denon receiver 9.3", 2 outlaw 2220 amps 3" each, and miscellaneous junk (wifi router, apple tv, amazon tv, playstation, xbox, etc.) + some fans + some room for future expansion. Thanks.