I'm looking to buy either one Airport Extreme or two Airport Expresses for my house. I already have a network of two Expresses but I need to get more range out of my network. Basically, the house is made out of concrete block so wifi has issues getting through the walls. What I'm wondering is if anyone has experience with the range of an Airport Extreme vs Express using g mode. I'm hoping that an Airport Extreme would have better range (by 25-50%) than the Express because it is a larger unit... but that is just me hoping. None of my computers have n, so thats not a factor here. So does anyone have experience with the range of the units?