Exactly what items are you still deciding on? If you aren't certain for the DVD Burner, then let me put it this way. Pioneer might possibly make a longer lasting drive, which might not make a difference for you. However, the Samsung ones I have probably perform as good as the Pioneers. So the Samsung would be my choice. Unless you absolutely do not care about burning CD's or DVD's. At which point you might look into plain DVD Drives, or BRD Drive if you want to spend a lot of money for HD.
For the case, the Antec 900 I have seems to have good airflow, with a small problem with noise (which I see as an equal tradeoff since its not a lot of noise). Since you don't care about looks, we still might need to know how you balance air flow vs noise level, along with a little bit of features (features might not have any importance to you at all).
Other than that, is there anything else you want to discuss?