What do you think of this water cooling setup.

I would go for a stronger pump, the X20 750 is only really intended for dedicated CPU loops, once you add in more blocks it will struggle. I recommend getting a D5 model like this one.
http://www.pccasegear.com/index.php?main_page=product_info&cPath=207_160_296&products_id=17897
Also, I would avoid bay mounted pumps. Theres no room to decouple (pad against vibration) in that space so it will be noisy.

You might want to also chase up some more details on those compression fittings, its OD isnt stated, which means your tubing wont fit if they don't match.