I am not sure about ASRock, but I have the Soyo SY-K7VME. The on board sound and video is find (no skipping frames) for DVD, GPS, and Winamp/VIS at the same time, but not as good compare to nForce on board video (Asus A7N8X-VM/400 I also have). The only reason I don't like about the Soyo board is that it only have 1 COM port (I need 2 or 3). The board doesn't have (Restore on Power Loss) options which is needed if the Shutdown Controller doesn't have a "push to turn on" (Jeff/Mastero SDC doesn't have that option). "Push to turn on" can be modified with a relay, a resistor, and a capacitor. I bought the Soyo board with a combo deal for an AMD XP 2500+ 45W Mobile, and later bought an Asus board.
The Soyo board recognize AMD mobile fine due to jumber selection of FSB. The Asus board doesn't recognize Mobile CPU (no jumber on board and no option in BIOS. I have to "pin-mod" the mobo to have it run as 2400+ which is fine.
Soyo board required extra P4 power connection (4 pins usually found on Pentium 4 board). Without that connection, the board won't POST even the CPU fan is on. Asus board doesnt' have/require P4 connector.
With either board and a XP 2500+ 45W mobile will run find on a 150W power supply (12V@4.5A, 5V@15A) connect to a DVD ROM (12V@2A,5V@1.5A) and a 7200RPM HD (12V@0.35A, 5V@0.75A).
I would recommended any MicroATX board with nForce2 chipset/onboard Video and if you are willing to do pin mod because NONE of the microATX/nForce2 chipset support (plug n play) AMD mobile CPU.
I am selling the Soyo board. If you want it, 35 buck ship to your door (only if you are in US). If you are using OPUS PSU and only need 1 COM port, and the Soyo board is fine.