Constantly dropping Wi-Fi connection

I know similar issues have been posted in the forums--I've tried out many of the suggestions and still can't seem to find a solution. My Macbook Pro constantly loses connection to the wi-fi network. All other devices are connecting fine (an iPhone, an Android phone, an Android Tablet, iPad and Windows PC).

I've already tried setting my router to a different channel, set authentication to WPA/WPA2 and had a hardware test done at the Apple Store (passed everything). Before attempting a reformat+reinstall as a last attempt, I was wondering if anyone might have any suggestions.

Here's the log around the time of a typical drop (drop happened at 9:15:59):

3/10/14 9:13:17.000 PM kernel[0]: MacAuthEvent en1 Auth result for: 1c:XXXXX MAC AUTH succeeded

3/10/14 9:13:17.000 PM kernel[0]: wlEvent: en1 en1 Link UP virtIf = 0

3/10/14 9:13:17.000 PM kernel[0]: wl0: Roamed or switched channel, reason #8, bssid 1c:XXXXX

3/10/14 9:13:17.000 PM kernel[0]: en1: BSSID changed to 1c:XXXXX

3/10/14 9:13:17.000 PM kernel[0]: AirPort: RSN handshake complete on en1

3/10/14 9:13:40.000 PM kernel[0]: MacAuthEvent en1 Auth result for: 1c:XXXXX MAC AUTH succeeded

3/10/14 9:13:40.000 PM kernel[0]: wlEvent: en1 en1 Link UP virtIf = 0

3/10/14 9:13:41.000 PM kernel[0]: wl0: Roamed or switched channel, reason #8, bssid 1c:XXXXX

3/10/14 9:13:41.000 PM kernel[0]: en1: BSSID changed to 1c:XXXXX

3/10/14 9:13:42.000 PM kernel[0]: AirPort: RSN handshake complete on en1

3/10/14 9:15:56.000 PM kernel[0]: MacAuthEvent en1 Auth result for: 1c:XXXXX MAC AUTH succeeded

3/10/14 9:15:56.000 PM kernel[0]: wlEvent: en1 en1 Link UP virtIf = 0

3/10/14 9:15:56.000 PM kernel[0]: wl0: Roamed or switched channel, reason #8, bssid 1c:XXXXX

3/10/14 9:15:56.000 PM kernel[0]: en1: BSSID changed to 1c:XXXXX

3/10/14 9:15:59.000 PM kernel[0]: wlEvent: en1 en1 Link DOWN virtIf = 0

3/10/14 9:15:59.000 PM kernel[0]: AirPort: Link Down on en1. Reason 2 (Previous authentication no longer valid).

3/10/14 9:16:00.110 PM acvpnagent[72]: The network interface for the VPN connection has gone down.

Please help!