First of all anyone who tells you a cheapy case in fine, doesn't know what they are talking about. Since cheap means skimping out on something and cheap products aren't usually good, just because they are a "good deal". So generally speaking a case is the foundation of your computer and the MOST important computer related factor for cooling, since more airflow correlates with lower case temps. To justify if upgrading is worth it, you need to clarify your budget, experience with working on computers, and all temps. If you have money burning a hole in your pocket and you figure that the upgrade is gonna benefit you, then by all means go ahead with it. I upgraded cases on a few builds in the past, not once did I feel it wasn't worth it...