Right now I have the dual ethernet "ufo" style airport extreme with b/g running g only at 11 mb/s. I am satisfied with the speed, but it lags at times. I want to upgrade to a new airport, but should I get the base station "Extreme" or the portable "express" or go all out with the time capsule? I'll run mostly 802.11n for my mbp on the new airport regardless, and keep the old ufo to run g for iphone/ipod touch. Which should I choose? Thanks a lot!