Hmm
track record: 2 disk read error ps2's for me one rrod xbox 360 so My experience MS gets the reliability nod considering there is no problems I know of that affected the original xbox. But ps2 and ps both had common well documented problems.
I think long and hard about would I buy as well...........
I would fire you by the way if you told customers to get the ps4 and made attempts to sell the x1 as a bad buy. from a business standpoint you want to move the most expensive stuff, that said I do think it's good to be knowledgeable and communicate with customers. I hate when I go to a game store and I know more about the shit they are selling than they do.
http://imageshack.com/a/img801/6426/f7pc.gif
^Yes that's me ripping it up in the GIF. :)