I bought a 25 set with HA pots, not particularly because I needed it to be HA, but it was what was in the store at the time and I had to bite the bullet and get the thing at some point (I am quite good at finding useful kit but then giving it a miss or putting it off when it's time to hand over the cash!).
I'm pretty happy with the HA pots but I ended up buying a NS frying pan for it, because it's still a bit of a bugger to scrape remnants of a fry-up from it after every use.
I think if I ever got a little 27 or similar for backpacking use (25 is a bit meaty for manpacking along with everything else, but a good camp stove) then I would get the non-stick pots. You would save on quite a bit of water and effort when cleaning them.
I would also say do get the kettle. It all stows internally so no added drag, it's an efficient way of getting hot water on (even of cooking boil-in-the-bags inside it) and by stowing the burner, pot grabber and any other little gubbins inside the kettle you'll be less likely to get your nice NS/HA pans scratched on the inside.