valve stem seal nightmare

[jmitro]

I bought a 06 x5 4.4i with N62 engine. Decided to change the valve stem seals myself using the AGA toolkit; unfortunately I managed to drop a valve into the cylinder on #2 (engine was supposed to be at TDC or very close but somehow it must have been off, and the air pressure must have been too low to keep the valve in place).

Anyway, stupid question, but I assume my only option now is to remove the head?

To remove the head, my options are:
1. do it myself (I need all the camshaft locking tools, timing tools, etc)
2. take it to a shop.

This is (was) my daily driver, so now I'm without a car. I'm mechanically inclined but don't have the tools for removing the head, and I've never done this job before, so I need suggestions from anyone who has performed a head removal on whether to try it myself or not, where to get tools from, what to change "while I'm in there" and what kind of head reconditioning to do while it's off.