[A6] MAC or PC for audio? motu 424 PCI card or hammerfall 9652? help me decide!!!

[vivalamarcha at web.de]

hi there i am still into deciding about my new studiosetup.
i am still hesitating between mac/PC and hammerfall and a system 
built around the new PCI 424 card and
some interfaces (24i and 308 for exemple)
has anybody any experience with this card?
any opniions on MAC/PC battle?
thanks
oliver