before i bought my card (pinnacle Sat Pro PCI), I had bought a skystar HD, with the aim of buying CI-Slot to see encrypted channels (MTV package).
I tried the card in my pc but I did not like the recording formats. that's the reason i switch to the pinnacle, because it has better recording formats (MPEG-1, MPEG-2, MPEG-4, DVB, DivX).
you don't have much choice, because many are not compatible with the CI-Slot. i only know Skystar HD or AZUREWAVE (which are the same board but with different brand). the price is around $100.
in my opinion I think you do well in exchange for your Austar because you will notice differences when you record from tv. I also had a system similar to yours but six months ago decided to invest on a card with DVB-S and was the best I have.
In conclusion, you should take into account whether you want a card that makes you enconding while you recording or a card you write in a different format, but there must be software that converts this format.
I hope I have helped and if you have any questions I try to explain the best I can.
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