New MBP drops wifi every 65 seconds

So I have a month-old 15" MBP 10,1 2.4 GHz i7, 16 GB running 10.8.4. From day one it has dropped the wifi regularly, I've tried over six networks at three locations. Every 65 seconds the wifi icon drops, searches, re-establishes the network. No other issues, and the hardware test runs OK. I'm currently on DHCP at work but it's very stable, all my other wifi devices are fine and have been for years. I get this in the console every time (I've taken out the date and obfuscated the MAC, IP etc):

12:05:35.000 PM kernel[0]: wlEvent: en0 en0 Link DOWN virtIf = 0

12:05:35.000 PM kernel[0]: AirPort: Link Down on en0. Reason 8 (Disassociated because station leaving).

12:05:35.000 PM kernel[0]: en0::IO80211Interface::postMessage bssid changed

12:05:36.503 PM configd[17]: network changed: v4(en0-:10.100.70.60) DNS- Proxy- SMB-

12:05:40.355 PM eapolclient[1027]: en0 STOP

12:05:40.683 PM eapolclient[1045]: en0 START

12:05:40.000 PM kernel[0]: MacAuthEvent en0 Auth result for: ac:a0:66:77:88:1c MAC AUTH succeeded

12:05:40.000 PM kernel[0]: wlEvent: en0 en0 Link UP virtIf = 0

12:05:40.000 PM kernel[0]: AirPort: Link Up on en0

12:05:40.000 PM kernel[0]: en0: BSSID changed to ac:a0:66:77:88:1c

12:05:40.000 PM kernel[0]: en0::IO80211Interface::postMessage bssid changed

12:05:40.763 PM eapolclient[1045]: eapmschapv2_success_request: successfully authenticated

12:05:40.774 PM eapolclient[1045]: en0 PEAP: successfully authenticated

12:05:40.000 PM kernel[0]: AirPort: RSN handshake complete on en0

12:05:41.531 PM digest-service[1029]: digest-request: uid=0

12:05:41.531 PM digest-service[1029]: digest-request: init request

12:05:41.532 PM digest-service[1029]: digest-request: init return domain: MY-MACBOOK server: MY-MACBOOK

12:05:41.802 PM configd[17]: network changed: v4(en0+:10.100.70.60) DNS+ Proxy+ SMB+

12:05:41.811 PM UserEventAgent[11]: Captive: en0: Not probing 'foobar' (protected network)

12:05:41.814 PM configd[17]: network changed: v4(en0!:10.100.70.60) DNS Proxy SMB

12:05:46.833 PM com.apple.launchd[1]: (com.apple.smb.preferences) Throttling respawn: Will start in 5 seconds

12:05:46.834 PM com.apple.launchd[1]: (com.apple.smb.preferences) Throttling respawn: Will start in 5 seconds

12:05:46.930 PM com.apple.launchd[1]: (com.apple.smb.preferences) Throttling respawn: Will start in 5 seconds

12:05:51.935 PM digest-service[1029]: digest-request: uid=0

12:05:51.935 PM digest-service[1029]: digest-request: init request

12:05:51.936 PM digest-service[1029]: digest-request: init return domain: MY-MACBOOK server: MY-MACBOOK

Any thoughts?

Thanks

Andrew