I use the usual WiFi WAPs such as noted in the CNET network forums. Here's a set for extending coverage into other spaces. http://www.amazon.com/dp/B00HSQAIQU/
There's a reason it's often the #1 or #2 best seller.
I have tried many different setups and gone through many routers. Currently we have the new Linksys router WRT 1900, 2 netgear access points and 2 netgear wireless extenders. My problem is areas in the house that get very poor speeds and very poor signal. The main linksys router is on the main floor. Connected to that are the 2 access points and about 30+ devices. Some wired most wireless. I have been getting very poor signal in the house. Connecting my computer to ethernet it runs much faster than through the wireless. (I connected my computer to a wireless extender). I am not sure what to do to get a better signal in the house. Are there any better brands of access points and routers I should look at? Something with a VERY long range with a VERY good speed?