5.0 in itself is quite horrid. Unless all devices are 5.0 AC. This will allow beam forming, and a supposed boost of strength to 2.4 range. However, just about zero devices are AC enabled, unless you want to spend money on a dongle and it can accept it.
My experience is that 5.0 is half to on third the range of 2.4. And in most cases, the signal strength of 2.4 is so strong that it will be faster than 5.0.
Please do note that microwaves, weather stations, odd stuff like that round the house can screw with 2.4.