Experience with Sirrix.PCI4S0 and BeroNet BN8S0


this is a purely hardware related question. We are looking for an ISDN-Interfacecard with at least 4, better 8, ports. We need the PtP-Feature and NT and TE Modes.
We found 2 cards that would fit our needs, the Sirrix.PCI4S0 and the BN8S0 from BeroNet.
Now since we cannot buy both cards just for testing, we would like to know, if some of you already have experience with one (or both) of these cards.
We are running asterisk on Mandrake 10.1 and it is especially important for us to know, if the drivers are working fine for those cards.

Thanks for your help.