I just built my first new system in about 3 years, so I thought I'd make a quick post on how it went. I bought the ECS along with an Athlon XP 1600+ and a radeon 8500. I like the price and features of the motherboard, the drivers seem to be good and it has been stable running XP for a couple weeks. I do have a couple gripes about it, though, that I didn't notice in any of the searches I did online:
The audio headers for the on-board AC97 are directly under where the AGP card goes, I almost had to remove the video card to plug the cd-audio cable in.
There's only one fan header, and it is near the end of the board that is towards the front of the case. This made it impossible to plug in both of the rear-mounted case fans on my Chenming 601ae (same as antec SX1030), and pretty difficult to plug just one in.
-Steve