Sounds like you have a much more serious problem than simply VIA mobo issues. In my experience most of those issues have been resolved by updated VIA 4-IN-1's, BIOS updates, and OS patches. I'm betting that in your case you either have a serious resource conflict or a bad piece of hardware. Low power or heat could cause similar problems as well. Although earlier VIA boards had issues, I've helped friends put together several machines now on Abit KT7E boards that have been excellent and trouble free.
I personally went through some of the same issues with my Abit KA-7-100 board and classic Slot A Athlon 700 at first. Once I worked out the resource sharing issues, heat, power, and updated 4-in-1's and all, everything works great. My big problem was resource sharing issues, specifically with the SB Live. That thing just doesn't share at all. Once I got things re-arranged to prevent IRQ sharing, things got a whole lot more stable. Oh, and I toejamcanned my cheap RAM. I had all kinds of weird toejam happening until I got rid of the cheap RAM and slapped some good crucial stuff in there. Yeah and a 250 watt power supply? Bawahahaha, good luck, I had to go to 350, although I admit the Voodoo 5 5500 certainly played a part in that. I also found that the heatsink mating for those slot A Athlons SUCKS, and I still get stupidly high temps even running at stock speeds.
I do admit though... ya still can't beat that good old Intel BX chipset. Man that chipset rocked. My server box is an Abit BP6 dual Celleron BX based machine. What a sweet, reliable, and high performance little beast that is. I long for that kind of cheap MP solution for the Athlon chipset that has that kind of flexibility, power, and stability.