This past week, the online retailer Mr. Porter celebrated its 5th year in business. Why should men buy luxury designer clothes online? I still don't know the answer, but I'm sure that the 3,454,593 packages and 480,000 customers in 170 countries explains it all. Because of Mr. Porter, online shoppers (including myself) not only expect an online rack of clothes to be at our disposal - but an experience to go along with it. To celebrate their fifth year in business, I decided to choose a few of my favorite new arrivals from Mr. P.