Manuel,

If you want a great bag/case without wheels, the one I've been using with my Tyros4 is CMK04 by Levy's. (LEVY'S KYBD BAG 57 7/16" X 18 5/8" X 5 5/8"). Not sure if you can get it in USA, but when I bought it the retail was around $140+txs.

I'm very pleased with mine...very lightweight, lots of storage pockets for pedals and cords etc., and very well made...terrific overall protection.

Ian