Spec me a wireless router/repeater

[Happy]

Hi,

I have been asked to help a friend with some networking in their house. The house has three floors and currently they have a wireless router on the second floor. They have several 'dead' spots on the first floor. They have tried using boosters etc but they are no good.

I'm looking to get two routers one for the first floor and then another for the second. I'll be using the second as a repeater. Can anyone recommend any decent ones that would fit the fit the bill.

Or any better ways to handle the situation?

Thanks :)