First I must say that the N5 is by far the best phone I've ever had..... And I absolutely love it. :thumbup:
There are Tons of development for it and there is still continued support.
Easy to do dang near anything with it and the android world is at your finger tips with the N5.. Almost any ROM and or kernel is available for it.
If you can get one at a reasonable price, then I wouldn't hesitate to snach it up. Not to mention the resale value on it will still be great amount and allow you to put that $ towards the N6 or whatever other device you might choose to purchase.
Personally (even thought I love my N5) I will be purchasing a N6 come first of the year. I generally purchase my device's around Jan or Feb, when they have worked out a few of the kinks and bugs, by the second run.
I have fairly large hands and can easily control and handle the N5 without any issues. Even using the Galaxy Mega 6.3, (which is huge) I can still control, operate and function the device without any issues. So for the N6 being a 5.9 and with lower buton placement, it will be a perfect fit for me and can't wait to get one.
Plus the N5 will stay within my family and go to my wife... She see's it as a hand me down and I'm the one that gets all the new gadgets and toys but hey I'm the one paying for my device... Plus she is a bit envious of my N5, since the last device I passed down to her was an LG Optimus L9... Not so hot! Lol