Speaking from my experience as a journalist on the CE side of things, I would advise looking at 1080 line only, or saving up for it if you cant find a good one in you price band right now.  Even in terms of streaming video 720 is going to feel like 360 very soon.   One can easily argue that "its not necessary" or "cant tell the difference on a 23" monitor", but that's not the point.  Even if you publish at a lower resolution you always get a better product starting with more and decimating down.  On the flip side almost all monitors sold now down to 21.5" (and some even smaller) are 1080 line and scaling anything else up to that just adds artifacts.