Penzey's is a great resource for spices, herbs, mixtures and flavorings, and it is near the top of the list of spice shops. They have tons of spices, neatly organized, next to large smelling pots of that spice. you can take a whiff, get a feel for what you may buy, and then choose accordingly. Also, their prices are reasonable.
Excellent artisanal chocolate flown in weekly from Switzerland. This place is VERY expensive, but the chocolate is good. For top-quality chocolates, Teuscher is a safe bet for corporate or special occasion gift giving. The flower boxes are beautiful - but very pricey.