Help needed: Making a fan temperature control.

[MrPatate]

Hi,

I need to make a fan controller for my entertainment center before my equipment melt... So i though i could probably get some help from you. I've got no problem doing the circuit, but I don't have enough knowledge to design it myself.

I looked on Google and found 3 circuit that could be good, but I'm unsure which one to choose(they all have something I want, but none of them has everything).

What I want:
- I need the fan to be controlled via a temperature sensor (which I can adjust manually).
- There's gonna be 3 fans, each controlled by a seperate temp sensor. I don't care if I have to do 3 different circuit or a big one.
- They will all be supplied by one DC adapter(this is quite easy to be done).
- And I'd like to have a LED on when a fan is running(the brightness doesn't need to be related to the fan speed).

The circuits I've found:

1st: http://www.heatsink-guide.com/content.php?content=control.shtml
Pro: Small and the temperature is adjustable.
Con: No LED(I think I can simply add one in parrallel with the fan, correct me if I'm wrong) and it seems too easy and simple compared to the others (less efficient or durable?).

2nd:http://www.elecfree.com/electronic/temperature-controlled-fan-12v-dc/
Pro: Speed of the fan proportionnal to the temp, LED.
Con: Temp sensor not adjustable

3rd: http://www.virtual-hideout.net/guides/temp_controlled_fan/index.shtml
Pro: LED
Con: Temp sensor not adjustable

I'm a bit confused between the 2nd and 3rd since they do the same thing but the 2nd one is more complicated(more efficent?!?).

So I'd like your input and help please!
Thanks
Mat