Help needed for a FPGA begineer

Hi anakha thanks a lot for your reply. I have looked at the DSP development kits and it seems the prices are out of my budget, and I don't really need some of the other high-performance features like video processing and so on. I was wondering if there is any way I could configure Cyclone III family FPGA with ADC and DACs. Also is there any potential source of noise amplification while using FPGAs? I will be using differential mode signaling but still an estimate would be helpful. Also how many logic emlements I might need in a typical PID loop controller design?