Are you familiar with
this site? Its just one of a thousand car stereo reviews out there. I thought it might help out a bit.
Remember: Just because its more expensive doesn't mean that its better. Let Zymol be the example for that little phrase.
I'm just not pro Blaupunkt because of the cheap heads I've seen in autopart stores. I've felt how cheaply made they appear and have heard their ear shattering 15 W outputs.
The one you are looking at is obviously not one of those, but I'm just fearful of the name because of some of the cheaper things they have produced. Have you taken a trip down to a local stereo shop so you can see your choices before you buy them?
Oh, I notice that the one on ebay has only moved about $30 bucks in the last 3 days. That is sort of another sign about what people think about Blaupunkt. Not that the head that you want is a bad product, but it appears that there are more out there who get scared when they see the name 'Blaupunkt' as well. IMO you can get better sound out of the Pioneer unit. I've seen and heard the Pioneer DEH-P9300 and it really rocks. It looks way smooth in the car too.