Well, there are two that really interest me and I've heard great things about both.
http://www.briarshoppe.com/
http://www.croftspipes.com/home.htm
I can't say I've been to either but I've always wanted to. I stick to my local B&M but while I love that place they don't exactly have a pipe selection. The briar shoppe is the more popular of the two. Happy hunting!!