Hello OhSew!
I sure hope you will like your new PE as much as you think you will! It takes a little learning, but once you get to know it it is a fun and useful companion!
You might want to read what enTourage has to say, if you haven't already:
www.entourageedge.com. On the Knowledge Base page on that website is a User Guide for the PE, which will give you a head start. One thing to notice is the PE uses microSD cards, not SD. And yes, at least for some people the microSD has worked getting the Ermine update.
Can't wait to hear what you think when you get it!