that is almost exactly my bros build and he loves it. i would push thee buy button. about the case it is all down to personal preference. whatever you like better you should buy because its your money.
I reccomend a brand name because it gives some certainty of quality because there are hardly any reviews of optical drives so you don't really know what you are buying with those cheap brands.
As for the case I zould'nt take the NZXT as it's pretty bad quality. Also I'd go with an antec 300 illision instead of the normal one since it has more fans installed. Whether you go with the CM690 or the 300 is just down to personal preference.
If lite-on is good brand then go for it but I've never heard of it, but if you know it then ok. Srry just never heard of it. And I didn't really mean cheap brands I meant brands that you don't know if they deliver quality or not.