I have my DGL-4500 set on the 5ghz signal because I seem to get much faster connections but the range is terrible. I have a 2 story house and the router is in the middle of the house off of the floor. I get 3 bars right below the router at 240mbs but about 10 feet away the signal fades away. Is there any way to increase the range of the signal or should I just go to the 2.4 signal? Also, is the 5mgh signal really quicker?