In reply to GoneFishing111:
Generally speaking down is lighter for the same weight of fill as synthetic, will last longer than synthetics after repeated compression and is more compressible.
That said in Britain i seldom take a down jacket unless i know its going to be well below freezing all day or there is practically no chance of rain.
If youre only getting one jacket definitely go synthetic or youre stuffed when you need a warm jacket for the wet day.
Hydrophobic down is a great innovation and dries faster tho i still dont think it compares to something like primaloft in damp or wet conditions.
ME fitzroy is a great bit of kit and fairly bombproof. Plenty more choices too. Patagoina DAS parka if you can get one...a bit bulky but a total lifesaver in bad conditions. Arcteryx nuclei fl if youre after a really lightweight and fairly warm (for 300g jackets) jacket
Good luck...