Another advantage of not using the latest, hottest, tech, is that there will be several gigs of mailing list archives out on the net of people's past problems (also, stack overflow will be filled to the brim) with answers, to your common pitfalls.
Go with X.js + HipsterDB and you're gonna have a bad time when you run into a problem, because it's just so new that you're likely one of the first to run into it.
The article ended with "I just used wordpress and copy pasted some jquery" -- I approve.
The bottom line is getting shit done, not being a hipster.