Looking for another tuner for MythTV

I'm looking for a USB or PCIe DVB-C tuner with CI (CAM) slot. My second PCI slot is covered by the GPU heatsink.

Options I've found:
* NetUP Dual DVB-T/C-CI (PCIe) - This is a "professional" card, I've seen mentioned that it apparently costs over €900.
* Digital Devices DuoFlex C&T (PCIe) - Promising, but only their S2 device appears to be supported under Linux. CI slot only partially.
* Terratec H7 (USB2.0) - Not supported under Linux, or only without the CI slot.

Further question: Can the Alphacrypt Classic decrypt two Irdeto2 transports simultaneously, coming from a dual tuner?

I will probably edit this post a bit when other devices come up.