Another excellent place with lots of headphones is the Yamagiwa store in Akihabara. The widest selection of headphones I have ever set eyes on in one store, including the R10, K1000 and Stax Omega II. Full range of Senns, Beyers, AKGs, Sony, AT, Ultrasone and others including Shures. The Etys were the only ones missing in their line up.
A must see store if you are in Akihabara Electric Town, Tokyo