Kami, there may be an issue with getting powerstrip to work on the secondary (DVI) output with the component adapter. There was an issue with using the ATI component breakout adapter and Powerstrip, where powerstrip would not have access to several HDTV modes. And, in the modes that do work, there is a problem with excessive overscan. Supposedly these are issues with the Catalyst drivers, although that could be fixed in the latest revision (3.9).
I got my information from
www.avsforum.com , in the Home Theater Computers forum. A lot of posters there have AIW 9800/9600 Radeon Pros. Look into the video overlay issue closely though...my understanding is that there may be a difference in how this is handled on the 9600 over the 9800 (the 9600 supposedly is more flexible).
The PCI video card shouldn't be an issue at any rate.
Sorry I can't be of much more help...I was doing a bit of research on the ATI cards for future purchase, but have decided to hold off until Half Life 2 comes out.