help to choose material for hpc serveur dvd/s 4 tuner

hello

I want to make serveur ubunutu with myth (or tvheadend) with this card:

TBS6984 DVB-S2 Quad Tuner PCIe Card

anyone have already use this card ?

witch config for server .?

I want to re use an old pc with this config :

motherboard : Asus P5G41T-M LX
CPU : Pentium Dual-core CPU E5700 3.00Ghz
Ram : 4 GIga
Graphics : Geforce GT 520/PCIe/SSE2
HG ssd 64 giga for system and hd sata 2 2Tera for recording

and THE card : TBS6984 DVB-S2 Quad Tuner PCIe Card

and maybe in the future also one TBS6991 DVB-S2 Dual Tuner Dual CI PCIe Card

the goald is :

a HPC Serveur for :

1 - Media center livingroom
2 - server backend for tv streaming (mythtv or tvheadends if someone have test :) ) 4 tuner to manage recording and difuse diferent chanel in same time
3 - decodeur cccam oscam mgcamd
4 - PVR

I have 1 parabol with 2 head
and i want to use something like this :

Commutateur multiple Axing SPU 56-09

for add in the future another parabol with 2 other head
and the multiple output go to the server ubuntu

if someone can help me to choose the good material

thanks very a lot for help

regards