Daghan man sound card dedicated for audio recording, price ranges from $50- $15,000 for highend systems. My advice is to get m-audio cards - "prosumer" but bang for buck.
Also, a dual core like you mentioned will not cut it, audio editing is very processor intensive, so a quadcore is advisable especially when you starts using a few vst plugins on each track.
Other budget brands to look for that are available locally are Focusrite, Presonus, etc.. Naa sa SM Perfect Pitch or JB Music
Good luck, and happy recording
