US Polo Assn is one of the best brands for menswear - formal. They have a pretty good collection of shirts as well as golf tees, mainly classics. Not the dressy kind, but these are kind of shirts you wear on a casual date or a polo match or over a lunch with your in-laws. They are the casually elegant kind.
I can vouch for their quality. I own 4 to 5 USPA shirts, some two to three years old, yet they havent worn out. The pricing is a little higher than normal. The t-shirts are priced around 1500 and the shirts start from 2000 and can go up to 3000. But totally worth it.
It is a well known brand. Although I havent seen a standalone USPA store, it is mainly available at all the reputed megastores - Shoppers Stop, Central, Lifestyle are few to name.
If you are looking for quality clothing that is also elegant, choose USPA. Reserve these shirts for days when you want to look effortlessly sexy!