Router wireless Wan

Hello,

my provider has a wireless network 2,4 ghz, encripted with wpa, tkip, mschap2. I want to use my conection to 4 computers at home. I'm looking for a router wirless wan who is able to make the connection with my ISP network and split the bandwith to my computers to eth.

I make a little schema with what i want

ISP(wireless connection 2,4 ghz) --> Wan router (wpa, tkip, mschap2) --> (eth)--> 4 computers