Glad you are settled :):)
I went for the 80GB Hard Disc same as the mini. The system uses about 10GB and I have another 20GB music and 10GB pics, so to do any real work I needed soimething bigger. I don;t have any games (yet....!)
Its easy to upgrade the RAM later on but very difficult to upgrade the HDD so thats hwo I made my choice. With the Edu discount the 80GB cost only a fraction more than the base so I feel very happy:)