hi-end audio shop

Does anyone help to tell me where professional shops I can buy some hi-end products such as player, amplifier, receiver (Denon, Onkyo, ...) and speaker (Bose, Jamo, Klipse, B&W...) and CD/DVD as well. I've seen some names in Dhahran Mall, Rashid Mall, Jarir Bookstore but look like not many choices there.

Thanks.