If it looks like it is bolted on, screwed on etc then it's for Barry boys. If it looks like it is part of the car with smooth moulded lines then who cares who makes it. I find folks that are more concerned in brand name as opposed to looks are perhaps not focusing on what they want. If brand x looks nice, but is poorly fitted or attached. then no way. If someone has the skills to craft their own skirts, spoiler etc and it looks brilliant then I know what ones I would like. I love watching some of the American documentaries where you see folks making these mouldings from sheet metal.
Wheels are again a personal thing but is chrome a bit on the 'bling' side? Your choice, your decision. If you don't want a Barry Boy reputation, then keep it conservative
John the conservative Monster Raving Loony
What about buying my favourite? The CLK DTM