I think that waiting for the NX, even at this point, isn't that great of an idea. Though there is a good chance it is launching next year, it could end up launching 2017 instead, and you will more than likely have to ask this question again. Though let's say for certain its coming 2016, considering everything, there is about a 50/50 chance that the NX will have different architecture, thus not making it backwards compatible.
At this point I would either wait for a black Friday/cyber Monday deal or get it refurbished from Nintendo directly, which I think is around $200. Actually, this is what I am doing myself because I want have another one for my complete personal use (FF, XCX, etc). That being said, it has to pretty strong deal in order for me to get it, and it also depends on the amount games you wish to play and the amount of time you have.
At the end of the day, I think that you should believe in your on judgment here. Don't believe in us that belive in you, but the HollyGamer that believes in you.