Its so subjective beean. I think the LS Nepals are almost definitely warm enough unless you have a severe case of the cold feet. I would prefer the lighter and less easier to roll of the tongue Trango Extreme Evo Light GTX.
I am kind of affiliated with them but Mainpeak have the k5. They are an older model but a good price for a beginner.
Ah mate, if thats the case, just try them on. I can get a pair out of LS out of the box and they fit my normal feet fine. You will have so much choice in the shops in the Alps region. Salewa have some nice models and of course Scarpa are everywhere.