Eckhard Schnabel has a commentary out on Mark's Gospel in the Tyndale series. I've read everything he writes on mission in the New Testament.
UPDATE: The US Kindle version sends you to Alan Cole's older commentary. I've asked IVP to fix it. Make sure you buy the right one.
I've begun reading and Schnabel does not disappoint. Clear and concise. A good understanding of the mission of Jesus.