5ghz is a much faster connection and virtually no clutter, unlike the 2.4ghz band. 2.4ghz tends to penetrate better (walls, etc.) so it's part of the reason that band has a better signal. However, if you use 40mhz channels in the high range of 5ghz (159, 161, etc.) the signal becomes much stronger and cleaner. 2.4ghz will almost always have better range, especially indoors where walls come into play, but if you tweak 5ghz, you may not get as strong a signal, but it almost always be cleaner and faster.
If you can get 5ghz set up and working, it is considerably better than anything the 2.4ghz range has to offer.