Best wireless router for range?

I have gone through about 10 wireless routers and cannot seem to find one that provides enough wireless coverage in my home that is satisfactory.

I have a wireless access point in the basement attached to my SSL VPN router which is dedicated to the basement only. This works fine and I do not want to bother it.

One the middle floor we have the primary wireless access point/router which needs cover both the middle and upper floor. Home is about 2000 sq ft in total. I have tested wireless...

Best wireless router for range?