If i want working GGI dual headed support, what video card should i buy?

[Firstname Lastname]

I'm going to try a differnt approach at this.  I'd like to get dual headed 
GGI support and am willing to buy a video card to do so.  What video card 
should i buy?

I've notice that matrox has a dual headed card, which imagine works with 
itself :), and that the matrox seem to be more supported then the other 
cards.  would that be the card to get?

Thanks,
     Corey

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