Hi - Xb newbie here - just purchased it last week and love it :) and now am falling into the world of customization, aftermarket, etc. One thing I would like to do is add a new (larger) rear view mirror- and have seen some cool mirrors that have a compass, thermometer, and the mirror auto-dims.

Has anyone installed these before? and do you recommend any version and is any particular mounting kits needed?

Thanks!

... One thing I would like to do is add a new (larger) rear view mirror...
I do not know about the fancy features you mention, but for a larger mirror, see this thread:

http://www.scionlife.com/forums/viewtopic.php?t=45522

RPM