One of the following...they are dual band and have GREAT range...I own both of these presently and have no problems with either not even a complaint...vpn host works great through it and wireless media streaming is SICK. Also the models support direct connection of a usb hardrive as a network storage device for even easier filesharing in the home. I know your skill level so I'm sure you could manually set that up yourself if you need it. Bottom line is I have tested the first device extensively and have had no undesired activity. I have to leave my wireless off on one of my routers as I can see the ssid broadcast from the end of my road practically. 
source: Wikipedia
Both Linksys Models
E3000
A simultaneous dual-band gigabit model that replaced the WRT610N.
Version CPU speed RAM Flash memory Radio S/N Prefix Notes
1.0 Broadcom BCM4718 @ 480 MHz 64 MB 8 MB 2.4 GHz, 5 GHz CVQ0 DD-WRT supported with special builds as of 14567
FCC ID: Q87-E3000
E4200
A three-stream simultaneous dual-band gigabit model targeted for "high performance wireless entertainment"[11], with a rated maximum throughput of 450Mbps. This model also includes a USB port for storage, UPnP media streaming or a print server. Further details of the E4200's hardware are still unknown.
The E4200 also marks the first radical change in design of the Linksys series since Cisco launched the winged "spaceship" design first seen on the WRT400N. The E4200 features a minimalistic, streamlined design with no LEDs, labels or buttons visible on the front or top of the device. All traffic activity LEDs and buttons have been relocated to the rear of the device.
Version CPU speed RAM Flash memory Radio S/N Prefix Notes
1.0 Broadcom BCM4718 @ 480Mhz 64 MB 16 MB 2.4 GHz, 5 GHz
FCC ID: Q87-E4200
