Hi folks. i'm an absolute beginner, with an imac 800 running os10.2.8. i have cubase sx 1.0.51, and an old novation bass-station which i intend to use as a MIDI controller. but i have no way to attach the synth to my computer. presumably i need a MIDI interface of some kind. any ideas what i should go for and where i can get it from (2nd hand preferably)? i hear that it's tricky to upgrade an imac's soundcard, so i guess i need some external equip. will my default soundcard be up to cubase standard?

do i need anything else? thanks very much
glinka x