I recommend the Amped Wireless AP20000G!
I have this access point http://www.ampedwireless.com/products/ap20000g.html and it's got HARDCORE COVERAGE! I can easily stream videos from 100 ft away from the AP with very little buffering. It's also very easy to setup and it also has usb storage as well.
I've had it up for 2 weeks with no need for rebooting and anything else. I love it. it also has 4 guest networks per band (frequency) so you got nothing to worry about if someone comes over with thier device.