According to http://ezinearticles.com/?Dressing-for-the-Business-World---Accessories-Make-the-Man&id=779900, when you are already an established businessman, it helps a lot to wear the right clothing and accessories because it speaks a lot about your credibility and power as a businessman. So as you mentioned, for ties, going for solid silk tie is the best. It shows that you’re a serious man who likes things simple yet exquisite. In addition to it, a businessman should have an expensive pen to use for writing notes, checks and signing off a big deal. Why expensive? It is because you are powerful and established businessman. Another accessory that makes a man is the cufflinks. It pulls your entire outfit thus making you look clean and polished. Another accessory you will need is the money clip/wallet. If you are not comfortable with using money clip then having a nice leather wallet can make you look optimal businessman. Of course, the weather wear is also a must-have for businessmen as it doesn’t make you look good to be soaked with your wet clothes or be frost bitten. So that includes a nice black umbrella, nice hat for cold weather, scarf and leather gloves.

And I think a nice watch, an expensive phone like BlackBerry, laptop or Mac and attaché case would complete the businessman’s look.