what is the best WWLAN card between those ?

[prince_kassad14]

Intel Centrino Wireless-N 1000
ThinkPad bgn Wireless
Intel Centrino Advanced-N 6200 (2x2 AGN)
Intel Centrino Ultimate-N 6300 (3x3 AGN)
Intel Centrino Advanced-N + WiMAX 6250

what is the best choice ?

[Navck]

Depends on what you want, I'd use the 6300 for range and potential speed later when routers get released, but if you do use WiMAX, get the 6250.

[Volker]

Only the Intel 6xxx cards are serious contenders for the best card.

Intel Centrino Advanced-N 6200: Unless you have a 3-channel router (if you aren't sure you don't), just as good as the 6300.

Intel Centrino Ultimate-N 6300: Slightly more expensive, best WiFi-only card.

Intel Centrino Advanced-N + WiMAX 6250: Supports WiMAX, which seems to loose the 4G format war against LTE. Only in very few test markets. Linux fimware still not available.

[Navck]

Actually the third antenna connection CAN give you better signal quality at very long ranges. Its worth the 20 dollars to go from 6200 to 6300 at this point.