see, i have asus a7n8x deluxe version motherboard which equiped with a normal power supply fan.
Everytime when my computer was runnig at full speed. My room start to getting hotter. SO, i was going to two fan 80x80x* to my antec lanboy case. But what's the best choice for me to make? or which cooling fan shound i equipe the best?

system specification:
asus a7n8x deluxe, motherboard
athlon 2500+,cpu
1GB ,memory
maxtor 120 Gb ,hd
antec Lanboy case with two optional, one rear, one front, fan place.

If i did buy some kind of cooling fan, if both of them have temporature sensor control. Then what can i do to put both of the connector on a single 3 pin chassis fan connector on my motherboard??

Supposedly the best fans are made by Zalman for cpu cooling. For case cooling(180mm) you can get anything with 2 or more bearings.

Something to consider is getting rounded IDE cables to allow airflow. Also having a powersupply with 2 fans, one on the bottom and one in the rear, is very useful.

The general setup should be air intake at the bottom front of the case, and air blowing out the back top of the case. The importance is unrestricted air flow following the physics that heat rises and cold air falls. Your mileage may vary, but properly set up your case should run much cooler with a case on it than without.