Please provide more 5GHZ wifi channel options - restricting to channels 36-48 is too limiting

I have the same issue, all 4 channels that are available show poor performance due to the fact that my neighbors are riunning on the same channels. I live in a townhouse coimmunity which puts very close. The channels above 48 show to be excellent choices and I know would improve my wifi preformance. I spent $1000 on a new router to get the best performace I could and i'm being cut back to limitations on the cahannels available. Please fix this. I have 1GB service coming in, at the router hardwired I'm getting approx 935Mbps , on wifi I'm averaging 500Mbps within a 30ft range.