Nice write up. I did this a few weeks back on our n55 x3. Same steps as above. Was a very easy process. I personally feel it is very important to change the oil after the initial break in. Moving forward all changes will be done under the miantenance plan. Changing the oil is so simple I couldn't justify having the stealership do it for $200.
If anyone is worried about future warranty claims then by all means take it to the dealer and have them do it. As long as you keep your receipts you will be fine.