I think mining itself will be going through changes soon and I wouldn't jump into it yet, too many miners, issues with how big pools are, I would sit and wait with mining.
Yeah, I don't think mining is really profitable now unless:
-You already own a pretty good rig so won't have to invest in equipment
-You have some other advantage that will reduce costs in order to maximize profits
-You can build an extremely efficient rig
And, unless you have some way of getting the parts for pretty cheap, I don't think it's much worth building a new rig right now. Perhaps after the next difficulty change it will be different, especially since many hobbyists (like myself) will probably drop out. But, hopefully someone may design a more efficient rig shortly after the next change but before the change after that.
On the other hand, I enjoy tinkering with my miners, so, while it's only earning a few cents a day, I'll be running my rigs for a while yet just as a bit of an experiment and an excuse to tweak.