I'm going to look into all the suggestions. Much appreciated!
I'm pretty excited about being a first time BMW owner and am glad to be able to discuss/read about all things Bimmer here. Thanks again for having me.

Maybe I should've gone with the 3.0 model, but I fell in lust with the 4.8 Black Sapphire. It's covered by the CPO warranty until Fall of 2015.
Does anyone know if swapping rims/tires to a winter setup by myself will void the CPO warranty? Are the TPMs simple to reconnect? Thinking of all the above, as well as getting all-seasons on 18".

Btw, I just got the X5 last week and have been driving like a granny, locally. I hope hwy driving helps the mpg avg.