I don’t know exactly when it happened, but I’ve got a serious love affair with tweed. I reach for it again and again; there’s this invisible magnetism pulling me to the rack. Perhaps it’s the fabric’s provenance (think 18th century Scotland)? Or maybe it’s its understated sophistication, popularized by Coco Chanel? Either way, tweed has my number—and this season, it’s calling with the right price point!…