Go to Louis
1. It's an institution and the store itself is worth seeing
2. I go there often. I think they were in a rut a year or two back. They are not what they were but I think that's by design and it's fine. I think there current selection is really good.
3. If you're looking for stuff that's a little edgier than what they used to carry (e.g., Zegna Brioni) you'll find it with Marni, Dries, Barrett. If you want stuff less edgy, there's Kiton, Belvest (with...