...for around 100€ (like 140$) (PCIe of course)

So far i found the Leadtek PX9600GT Extreme, which has nice specs.

720 MHz Core Clock
1800 MHz Memory Clock

For around 99 Euro.

Any better suggestions?
Don't recomment the 8800GS or GT please, the GS is too loud and the GT too hot for my taste =P