Hi!
I bought one because it could do BOTH AGP and PCI-E simultaneously
(yes!). It is called Asrock 939 Dual SATA.
http://www.techpowerup.com/reviews/ASRock/939Dual-SATA2/2
Money was not the reason for buying this over Asus for example. I wanted
this particular board.
I had a £250 AGP card that I didn't want to upgrade, however I needed a
new motherboard.
This motherboard got fantastic reviews in CustomPC (a UK enthusiast
magazine) - won awards etc.
People were saying that Asrock was not as good as other makes, but I
trust that magazine! There were some other good reviews online as well.
It was cheap, easy to use, nice looking and reliable. I am pleased with it.
The downside is that it is not very easy to overclock. You can only
overclock a little bit until it becomes unstable.
(at least that was my experience).
However, a (supposedly) easy hardware hack which involves a small
alteration to the mobo with a tool which I don't know the English name
for fixes that problem. (I didn't try it)
But after doing that that you can do some serious overclocking according
to people online.
I haven't done it though, but it is explained online.