ptp 100m line of sight

Hi,

I've just bought a house with no broadband connection. My brother lives about 100m LOS (320ft) away from me and has a 250mbit/s fiber connection.

I can't decide what radios to buy. I just want maxium speed out of that fiber connection for about 200 euros.

Should i buy a pair of Nanostation M5 or Nanobeam ACs(NBE-A5AC-16) ?

Excuse my bad english.

/A