I'm looking to add to my basic wardrobe with a navy or black blazer. I already have a blue pinstripe (Brooks Brothers), a half-lined charcoal SC (BB), a black cashmere 2B SC (BB) and a brown tweed SC (CK Collection). At this stage, I'd rather buy close to the best and not have to worry about upgrading in the near future (5-10 years), and have found that Canali, Zegna, and Isaia complement my slim build the best. So how much would you guys pay for a simple, 2 or 3B blue or navy SC? AKA: What's reasonable? and what's a good deal? I have no immediate time frame.