Dude, that rocks! I am actually doing a similar setup of a Lian-Li with a BIX (see picture for intial layout --yes, that's an aluminium Panaflo

):
I was going to put a plexi shroud _between_ the fan and rad, but putting it _over_ the fan looks much better! Mind if I pinch the idea?
Also, I would be curious to know what you are going to do to the filter to increase flow.
As for the bezel (of my PC-12), I am painstakingly drilling out the holes and squaring them with a file, so the whole thing keeps its factory finish look. Tedious, but worthwhile the effort; in aircooling it is reported to drop case temps by another few degrees so it can't be bad for the rad either.