OH and I do a lot of walking and have several waterproofs.
For light showers and warm weather Goretex Packlite jackets are wonderful. They're lightweight, easy to pack, dry quickly, breathable and shed water well.
For heavy drizzle and continuous light rain any mid-price breathable jacket will do. I found a Lowe Triple Point jacket in a sale. Rather than use the hood (which isn't really deep enough) I have a Tilley hat with a brim - it stops the water running down my neck.
For those really torrential days I have a Berghaus 'Cornice' jacket. Its longer than most waterproofs, breathable, and has a really deep hood. A decent breathable waterproof trouser keeps most of the water out.
Any breathable jacket needs to be proofed regularly otherwise it stops breathing. The rain soaks the outside of the jacket and condensation builds up inside. Once a year we put them in the washing machine with Nikwax jacket cleaner then re-proof them. Its really important to get all residual soap out of the washing machine before doing this so we run the machine on a short cycle without detergents before doing the jackets.
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Anyway as long as you don't mind you bottm half wearing farmers clothes Flexothane waterproofs are the best. Last time I watched the Yorkshire vet he was wearing a pair while helping a cow calve .
