I decided to give netio a go.
Server osx -  Gigabit
Laptop osx - WIFI N
1.5 Meters away from router, direct line of sight
2.4GHZ Channel 3 (osx doesnt allow wide channel on 2.4GHZ) 130mbps
NETIO - Network Throughput Benchmark, Version 1.31
(C) 1997-2010 Kai Uwe Rommel
TCP connection established.
Packet size  1k bytes:  6041.38 KByte/s Tx,  5826.16 KByte/s Rx.
Packet size  2k bytes:  5846.72 KByte/s Tx,  6198.12 KByte/s Rx.
Packet size  4k bytes:  5787.52 KByte/s Tx,  6035.44 KByte/s Rx.
Packet size  8k bytes:  8527.84 KByte/s Tx,  6229.32 KByte/s Rx.
Packet size 16k bytes:  9322.71 KByte/s Tx,  6381.58 KByte/s Rx.
Packet size 32k bytes:  9941.03 KByte/s Tx,  5466.47 KByte/s Rx.
Done.
5GHZ channel 48 HT40- 300mbps
NETIO - Network Throughput Benchmark, Version 1.31
(C) 1997-2010 Kai Uwe Rommel
TCP connection established.
Packet size  1k bytes:  14.72 MByte/s Tx,  5132.46 KByte/s Rx.
Packet size  2k bytes:  14.66 MByte/s Tx,  4743.09 KByte/s Rx.
Packet size  4k bytes:  16.16 MByte/s Tx,  5213.75 KByte/s Rx.
Packet size  8k bytes:  17.63 MByte/s Tx,  5770.01 KByte/s Rx.
Packet size 16k bytes:  17.54 MByte/s Tx,  5794.08 KByte/s Rx.
Packet size 32k bytes:  18.23 MByte/s Tx,  5892.96 KByte/s Rx.
Done.
From that I conclude that
1) my router is ok
2) my TX is way higher than my RX
3) when i copy a file from laptop to gigabit server it goes at 15MB/s
4) when i copy a file from gigabit server to laptop it goes at 6MB/s
So now that i know that, how do i increase my RX? 
EDIT:
So after more tests i will stay in channel 4 HT40+ for 2.4GHZ
NETIO - Network Throughput Benchmark, Version 1.31
(C) 1997-2010 Kai Uwe Rommel
TCP connection established.
Packet size  1k bytes:  9331.09 KByte/s Tx,  5903.45 KByte/s Rx.
Packet size  2k bytes:  9494.45 KByte/s Tx,  6084.17 KByte/s Rx.
Packet size  4k bytes:  10189.33 KByte/s Tx,  6587.74 KByte/s Rx.
Packet size  8k bytes:  10.35 MByte/s Tx,  6922.70 KByte/s Rx.
Packet size 16k bytes:  10.21 MByte/s Tx,  6632.32 KByte/s Rx.
Packet size 32k bytes:  10.22 MByte/s Tx,  6845.25 KByte/s Rx.
Done.
And channel 36 HT40+ got 5GHZ
NETIO - Network Throughput Benchmark, Version 1.31
(C) 1997-2010 Kai Uwe Rommel
TCP connection established.
Packet size  1k bytes:  10.98 MByte/s Tx,  5353.09 KByte/s Rx.
Packet size  2k bytes:  13.15 MByte/s Tx,  6598.59 KByte/s Rx.
Packet size  4k bytes:  18.20 MByte/s Tx,  5749.14 KByte/s Rx.
Packet size  8k bytes:  18.56 MByte/s Tx,  5846.49 KByte/s Rx.
Packet size 16k bytes:  18.72 MByte/s Tx,  5087.43 KByte/s Rx.
Packet size 32k bytes:  18.78 MByte/s Tx,  6648.92 KByte/s Rx.
											(Last edited by abolition on 18 Jan 2011, 11:08)