Airflow question

Alright, so I have an Antec DF-85 case, and I have this snaking feeling that for how many fans I have my internal case temps are too high.

So here's what I have running fan wise:

Intake:
4 120mm fans, 3 in front one on side.

Exhaust:
2 120mm fans, both on back
2 140mm fans, both on top

Misc:
2 120mm fans in push/pull on my cpu heatsink, The pull fan is right near the upper back exhaust fan.


So my questions are mainly about airflow...

Do I have the fans set right? Mainly the side fan, should I change it to exhaust instead of intake?

My average temps are sitting at 24C is that good or bad? I really have no idea what to aim for here.

Lastly, how much am I affecting airflow using a pull fan that seems so close to the upper back exhaust? They have a small bit of space between them (I can put around 2 fingers between them),
but I have noticed if I look down through the top fan grills while it's running the upper fan seems slower...

What I mean by that is I can see it spinning so to speak... Where as the identical fan below it seems faster.


Oh and one more quick thing, what am I looking for in terms of fans to buy? Currently I've just been settling on Red LED fans because they look cool... xD


Thanks!