80 gigs storage and single hard-disk is definitely not for viditing... add at least another 80 gig drive, you'll be glad you did, later, also check out the thread about "why should we have more than 1 hd".
GeForce4 MX4000 rocks if eveything you do is 2D (no games, that is), I've been using this card for quite a while now and what can I say, maybe a new card would speed up rendering a little bit but I can't afford that.
Good luck!