Outdoor Wireless Access Point with a 50m range?

[Princey]

What's the best outdoor WAP with atleast a 50 range to connect to a BT Infinity router which will be indoors? It doesn't need to be fancy with tons of feature, it just needs to act like a normal WAP but with a great range to cover a small harbour.

Will I need to replace the router? Can I get away with using just a directional aerial?

 

[Princey]

From what I've seen, they're PtP with a directional arieal. I need the AP to cover around 60 degrees from the AP location. I have a budget of around £100. It needs to be able to work in AP Infrastructure mode so it's just a wireless extension of the existing Ethernet network.

 

[Princey]

Thanks for the help Shelster, that certainly looks like a viable option.

One more thing I've thought of though would be something like

http://www.overclockers.co.uk/showproduct.php?prodid=NW-006-TP&groupid=46&catid=1837

but with a 15db outdoor attenna such as

http://uk.tp-link.com/products/details/?categoryid=2474&model=TL-ANT2415D

would that be compatible with the above access point? Obviously with an F Plug to SMA adapter?