I'm a huge fan of Juicy's line of couture clothing just for dogs... i love their stuff... super cute! A bit on the expensive side but really really high quality, durable, and well sewn dog clothes that fit really well. My little guy has better clothes than me!
A few places I got my stuff from:
http://www.pawlishedpaws.com/product...?idCategory=15 http://www.glamourdog.com/