VeChain is the best of your list, of course.
Do you think VeChain is a best bet than XSPEC and Dent? Dent has a lot of potential, but I agree that, for now, is more like a gamble. XSPEC on the other hand has been growing with a nice pace and it seems to have good tech behind it. I'm between VeChain and XSPEC right now, and the one that I'm not selling for now is XRP, it's growing like crazy.
Tell me about it, I had like USD $1.000 invested on NXT. It was like a kick in the ... when I woke up today and saw that I lost half of it. I just sold it a couple of minutes ago, It's too unstable and there are better options, I think.