First thoughts are that you don't need the 750W PSU, your build won't draw more than 500W or so.
I would recommend a good air cooler such as a Phanteks or NH-D14 over the closed loop cooler.
The 830 is a good SSD but have a look at the 840 Pro too.
I'd possibly look at changing the memory, Vengeance isn't the most reliable RAM out there.
As for the optical drive, they're all fairly similar nowadays, I would just pick one from a decent brand like LiteOn, Asus, Samsung or Sony.