I've got suits and separates from Klim, Revit, Dainese, Halvorssons and BMW that I've accumulated over the years in the search for the holy grail of motorcycle suits. Despite not really liking the style of them my go to summer touring kit is my Rallye 3. Extremely comfortable, protective, well vented and flexible in a range of conditions. Bin the inner liners, get some goretex pac lite over trouser with a full length zip, a goretex over jacket and a heated liner and you'll have a suit that will take you comfortably through most conditions your likely to encounter on a typical 3 season tour.
As an only suit for 4 season riding in the UK it's flawed and I'd probably be looking at Klim or the new Revit stuff. But a 2nd hand twat suit off here is a good buy to supplement one of those.