Probably usb tuners would be the simplest solution. If you really need tuner cards, one thing to consider is most motherboards these days have a mix of PCI slots. Some regular, some PCIe .You can't get mobos with a lot of the older PCI slots. There are two work arounds. One is to get a PCI bus extender cage such as those made by Magma. You really don't want to get a new one since they are incredibly overpriced. I got a used one for around $250 and it enabled me to add 6 extra PCI slots. You lose one slot on the mobo to plug in the host card. You lose a second slot on the Magma backplane to plug in the bus driver card.. So an 8 slot PCI card bus extender gets you 6 new slots. For multiple sound cards, this works fine. Modern windows and linux kernals already have the drivers. You just need to insure you turn on the Magma before booting the PC. The other alternative would be to get small form factor PCs, and network them