Low Budget HTPC with Ceton InfinitTV 4

Hi,

I have just recently bought a Ceton InfiniTV 4 card.

I want to build a HTPC ( budget ) that plays 1080p Videos stutter free.

Can anybody suggest me good config or their own experince with Ceton + WMC based Setup. I would be streaming to an XBox 360 Media extender from the HTPC too.

Thanks in advance