Your paying for quality control and peace of mind with Bk.
If knowing you have a genuine Swiss movement and everything is adjusted, setup and aligned is worth anything to you, go Bk.
I'm not one of his fanboys and have never ordered from him, but he's got a great reputation over a long time and his prices are fair to me.
If your not a detail person and want the absolute best bargain, you can research and find your watch cheaper. It's really about priorities.