V.N.
My absolute favorite is Banana republic. It can be pricey but if you walk to the back of the store or go to the outlet store you can get some great deals. Or occasionally going on line they offer 30% off ect.
I feel it is age appropriate but still hip and what I choose usually always stays in fashion.
As far as jeans I do buy designer jeans from Nordstrom's or boutiques as I feel they are most comfortable and last long. I usually like Joe Jeans and Citizens for humanity.