I bought Draytek 2830n router which offers both 2.4Ghz and 5.8Ghz. When running on 2.4Ghz AirRadar and iStumbler show 65% signal, but when I change to 5.8Ghz signal immediately drops almost by half to 35%. So question, is Airport N that comes with MP 5.8Ghz compatible? Router is less than half meter in clear range with Mac Pro, so I would rather expect signal close to 100% on both frequencies. I checked on my wife's Mac Mini and it's the same poor signal.