Do you purchase your watch at a specialized jewelry shop, mall jewelry shop, department store (bloomingdales, Neiman Marcus, Saks, Nordstroms), large goods store (sams, costco), amazon.com's sellers, eBay, or the boutique? I'm thinking of getting an omega watch and the only boutique is on rodeo dr. in california. It's a bit of a drive. I was wondering if i could go into a local mall's jewelry store for it. I'm worried about authenticity if I don't get it straight from the boutique and price wise should be all relatively the same? Thanks in advance for your input.