look into a cradlepoint Mbr1000.

Newegg.com - CradlePoint 3g Wireless N- Hot Spot Broadband Router (MBR1000) - Just add your GSM Chip! - Cell Phone Accessories

Much cheaper off ebay. I just set up mine and now im connected on the N network at 130mbps. Thats through 4 walls.

My router is out in the garage and my computer is down a level and at the other end of my house. It has some POWER I must say.

Also... Look at your wireless card too. If its a G it wont pick up the N network. You may need to upgrade that, I just went down that road had to upgrade all my stuff to get internet at home.