PCI slots, because they would allow all of the other things - USB, Ethernet, Firewire, Video, whatever. Of course this is as long as there were drivers.
Every time I look at networking my A2000 I just cannot bring myself to spend $100+ to get a 10Mbit ethernet card, when I can buy a Gigabit PCI card for <$30. Same with USB controller & video.
Pete
