Which one do I get? I'm buying 2x
Noooo... not HTC One X. The HTC One.
In terms of info, do some research on the best Android phone currently available... plenty of comparisons out there. At the moment seems like it is a toss up between the HTC One and Nexus 5... I'd say from build quality perspective the HTC One still takes the cake. I don't like the GS4 since it feels plastic-y and cheap. The Nexus 5 has the advantage of being vanilla Android right from Google (faster updates) plus it is generally cheaper direct from Google Play.
I have the HTC One now, very happy with it but thinking about grabbing a Nexus 5 as well to go back and forth between the two.
Let me know if you end up going with one or the other - my lady lost her HTC One and we are looking for a way to make her square again, she's creaking along on an Atrix 1..