In reply to All that are interested:
As I have posted on other threads about the differences between the summit and the nutrino.
THe summit is box wall construction, the nutrino is stitch through.
The nutrino has slightly higher fill.
Therefore the nutrino will be slightly warmer until it gets really cold then you could get more cold spots due to the stitch through. Where as the summit will be ever so slightly cooler but won't get cold spots, and so will be warmer at lower temperatures.
The summit has a more durable outer shell, but because of this is slightly more bulky.
THe nutrino is slightly lighter so in theory packs down smaller but this means the outer shell is thinner fabric.
So I gues if you want it to be light and to pack down but your not going somewhere that is very cold then the nutrino is best.
If you are needing a jacket that will last, be more comfortable at low temps and you need hard wearing clothing then go for the summit.
I did see a last years nurtino getting a rip in the shell from walking around burbage south (it wasn't even a bush with prickles or thorns) but from what I can gather the new material is meant to be better.
Oh, and what I mean by really cold is well below freezing, ie moscow weather not english weather.