A few years ago, after setting up my home media server, I went through 5-6 different brand N routers trying to find one that wouldn't stutter the 1080p (or even 720p) video on just one client. I finally gave up and went wired.
Fast forward a couple years, we moved and I just didn't feel like running cable everywhere, so I bought a the latest gen Airport Express to use as my primary wifi router. It worked flawlessly. No more stuttering, and I could have multiple clients streaming off of the server without any issue.
Last year we moved yet again and I retained the same setup for a while, but about 2 months ago I really wanted to extend my wifi a bit further, so I picked up the latest AEBS. I don't have anything in the house that can use AC but I liked that it was future proofed; plus the MIMO having 3 antennas increased throughput to my iMac and other devices. I used the express to extend the wifi out to the backyard shed without having to run any cable out there. I can still stream HD videos to multiple clients without a single hiccup - I have 3 kids, my wife, and myself, and often there's at least 3-4 different things being watched on the weekends at the same time. Not an issue. I *highly* recommend an Apple router for your purposes.
I'm not sure what difference it makes re: the file system unless you really want to hang a USB stick off your router - it's not a feature I have any interest in using.
The CNET article is a joke IMO. It's like Consumer Reports ripping Jeeps because they aren't passenger cars. Wrong audience. So often I see the criticism of Apple's products being that they aren't granular enough for the "geek" class to appreciate. So what. I'm an IT guy and have been a computer aficionado since I was 8 (mid 30s now) and nowadays, frankly, I don't really care if I can't dive down into the deep recesses of the router settings. I have to do that stuff all day for work - when I come home, I just want my crap to work with minimal tinkering. I'm more interested in USING the tech to achieve a purpose than picking apart the tech itself just because.
tl;dr: if you want a router that will stream video flawlessly, go with an Apple brand; if you want to tinker with it, look elsewhere but be prepared for it to possibly not stream as well.