Hi Pilot09
I am a student pilot too and happens to be a Network and Systems Administrator by profession.
In my view your demand for powerful PC depends on the flight simulator and add-on you are planning to run on it. In my knowledge and experience, there are only 3 best flight sims out there: FSX/FSX:SE, P3D and X-Plane, and I use 2 out of them to learn different procedures. I use FSX:SE and X-Plane 10 on different occasions to try and learn different VFR and IFR procedure.
If you are planning to use FSX for learning...then you can get by with 4-8 GB RAM and if you are planning to