£31.88 / £44.60 from lambda-tek.com. Dunno what the difference between the two are.
Also don't know if the dual head bit would have to use the VGA, i.e. it's DVI + VGA or HDMI + VGA or whether you can use the DVI + HDMI. I think that was the one I bought for my media centre, but I'm not opening up my case to find out. I'm single heading it at 1920x1080.
BBC iplayer choppy at fullscreen though, but mythtv and VLC work fine.
From what I have seen, the ones mentioning VGA output usually mean that there is a VGA port and a DVI port (with a DVI > HDMI converter).
The only silent dual DVI card I could find when I went looking a few months back was the "Asus 9600GT Silent". Whack that into Google and you'll get a few options.
Personally, I have had major issues with Lambda-Tek (charging my card, failing to deliver and then trying to increase the price of an item and having to quote the sale of goods act to get my money back).