LID,
I had my surgery at House on 11/13/12, so I will be celebrating my 1 year and 1 day anniversary while you are in the good hands of the doctors at House. Dr. Schwartz did my surgery with Dr. Brackmann and things have gone very well for me and my tumor was much larger than yours.
You have made a good decision and now you just need to do your best to relax and prepare for your surgery and recovery. There is no MRI before or after surgery, but they did do a CAT SCAN after surgery in my case. I assumed that was standard procedure and I really don't remember anything about it except wondering how they got my on the machine, a very bright light, and then hearing Dr. Schwartz say that everything looked normal. I was still very much drugged up at that point and probably a lot of people just sleep through that entire process.
Keep positive and before you know it, you will be back home and on your road to recovery.
Ken