Joe, cool. Air radar did work the best.
73% on imac
33% on laptop

Airport extreme is $180
Airport express is $100 (thats a repeater?)

Is all greek to me now but I can go to an Apple store down the block. It's a pity to have to spend for this but...

I wouldn't want to chose another network, what a neighbor?

How do you know of interference?

currently I have a netgear router, dsl is going into it.