I recommend a 0.080 to 0.160 TB SSD and a 1.0 to 2.2 TB 7200 rpm hard-drive as a good balance. Put your OS, web browser, office and helper applications like media players, etc. on your SSD and then put your games and other storage hogs on the hard-drive.
i7-2600K, H70, P8P67-M Pro, 16 GiB, HD7950, SSD, 3 HD, Blu-ray, X-Fi Ti Pro, Antec P182, S75CF, 3007WFP+2001FP, RK-9000BR, MX518
i5-3570K, GeminII-S524, P8Z77-M Pro, 16 GiB, HD7770, SSD, 2 HD, Blu-ray, InifiniTV4, NSK2480, 55" TV; Asus UX32VD