ok. so i bought the new airport extreme "n". took it back for refund. airport kept clipping out a lot, especially when visualizer is on; losing usb drive and printer was a problem. error code (-3256) spent close to 20 hours with applecare. they couldn't figure out the problem. took MacBook, extreme "n" and express into apple store to talk to genius. he wouldn't even bother to test it. he said it's normal -- MacBooks won't communicate with multiple base stations. he has the same problem with his setup since may. he replaced airport card in mb; replaced base stations (express and extreme). he even bought a macbook pro. all to no avail. he can't find a fix for it. he thinks it's a software issue. maybe something with itunes and visualizer both being heavy processor users. or multiple signals that interfere with each other. i think it's a macbook flaw. i had no problem with it on my emac -- only the macbook. i told them to email me when they get it figured out and i'll come back in and buy another extreme.