This Case or This One?

Both will supply sufficient airflow for your parts.
I might pick the cheaper one, and spend the difference on parts that perform better.
For example, use a 4670K and a Z87 based motherboard.
With a conservative oc, you will get 20% more compute capability.
 
Ok, because personally i prefer the more expensive one, not by much.
When saying getting a better cpu and mobo, this is my first time, so would over clocking conservatively like you say be hard?