Depends on what you're buying the card for.
If you just want to tune regular NTSC signals, a VCR player will do the job with the PDA 5002 card.
If you want to tune ATSC (HiDef TV) depends on what your source is - OTA, cable, satellite. You may need a cable tuner or satellite tuner for those sources so the Aurora 1000+ would only function as an OTA ATSC tuner then.
If you're worried about HDCP, I would wait until that becomes a "real" threat to your viewing sources, before you upgrade the DVI port.
Long answer short - the PDA 5002 card may be just fine for your current sources.
Example: In my case, using the display inputs and the 5002 inputs -
Input 1 is an HTPC feeding OTA HiDef TV with a 75 foot VGA cable.
Input 2 is a progressive scan DVD player with component (RCA to BNC adapters)
Input 3 is a VCR feeding NTSC and tape with an s video cable
An alternative would be to hook the VCR up to Input 4 with a composite cable.