Omara86, this is just a suggestion from my POV.
From my POV, your design has too many arcylic window.

First off, why do you need window for 5.25bays?
Is there anything there that you really want to show?

Second, the small window, what's that for?
I think it'll be better if you just make larger sidewindow and the smaller window into one sidewindow.

The top panel window, do you really need that?
And do you really need two blowhole on the top?

If there's a casing that has top blowhole, it'll be an exhaust blowhole which is going to be used to speed up the exhaust for the hot air to be blown out.
I think you only need one blowhole for that.

If i were you, i'd concentrate on this:
Keep the design as simple & smooth as possible. But, use a really good paint on the casing, better yet, paint the casing as smooth as possible to make it mirror shine.

With that, you'll have a superb casing to be shown off.
Not by complicated arcylic window here and there, just a simple mod but paired the mod with a superb mirror shine paint.

Just my suggestion.