Hey, I know it's an old thread, but this might be useful...
I was planning on an Aerostich suit, but the post-"duty" price scared me off. Instead I blew £250 on an all-in-one Triumph suit. I've ridden 160 mile round trips to London each day this winter and washed the suit about 5 times. Comes up a treat, keeps the water out and, with the liner in it, is too warm (really) unless you're sat on the motorway at 70+ for an hour or two.
Got a BMW two-piece second hand from the www, and reckon the Triumph's the better bit of kit. Armoured too, loadsa pockets.
MMC