Steve Gates :
Airm3n :
http://www.newegg.com/Product/Product.aspx?Item=N82E16833122454
I use this one personally and get great range and a good solid connection. I have tried that linksys one that busterstech listed before and its spotty at best at the time i used it(maybe improved with firmware updates).
Will a range extender reduce my internet speed?
If you run them like most people as wireless repeaters the causes at least 50% reduction in speed and that assume optimum placements. Obviously it does no good to set it right next to the router or right next to your computer. If you were to run a ethernet cable part way and then use the extender as a AP that will not reduce your speed.
USAFret list is your best guide. You only want to use a wireless repeater/extender as a last option when you can get nothing else to work. When you start using repeaters you must just accept that you are going to get less throughput and much more random issues due to wireless interference.
The number of bars you get for signal strength is only part of the issue a very clean signal at low signal level can still get better throughput than a strong signal with lots of interference. When you run repeaters you are intentionally transmitting a second interfering signal.