Pronator

Hi I'm new to the forum and this is my first post. I have an RX 400 and would like to get winter tyres - I live in Scotland and will be driving to the Italian Alps next month. I note a very good report by one of our members regarding the Pirelli Scorpion, also an amusing observation about snow chains - ie don't bother; if you need them, the road will be impassable anyway because of other cars that are stuck! Having seen a brand new Range Rover with all its electronics whirring and flashing as it slid backwards on sheet ice towards a river, I will take a set anyway, I assume I just get these from my local Lexus dealership. Any suggestions would be welcome. Many thanks Paul Macintyre