I also have the ECS 6vaaa, its a bit touchy at the higher bus speeds, i have had lots of problems getting w2k to run with 933's, also the bios dosent support v-core adjustment, there is a service bios available that does have the v-core adjustment but I could naver get it to run with w2k in dual processor mode
The vp-6 set up with no problems at all, if you are liiking for a cheap board the epox 6dva would be my choice, paragon has used ones for 69 bucks plus shipping, i think id get that instead of the ecs