I don't think it matters which ccv you have installed unless you think you could move to colder climates.
The labor required to install the ccv is pretty extensive. Check YouTube - BavAuto has a 3-part video of the task. So $275 for labor (2.5 hours) is a good price.
The ccv is a critical part of the emissions system, believe it or not. Also, a failing ccv can pump oil into the intake system causing $$$$$$$ damage. Check Pelican Parts, ECS Tuning and other sources for parts manufactured by BMW suppliers.