I've never used MSI, but I've heard good things about their products. I'm currently using a PC-Chips M847LU (same as an ECS K7S7AG) and I think it's great. On the basis of strictly hearsay, the only board brand I keep hearing bad things about is Soyo. Again, I've never used a Soyo board though.
A board of any brand name, however, should run fine provided it is installed correctly and is given good, properly-working components (eg. RAM that works like it should ditto PSU, etc.), regardless of whether it was made by ECS/PC-Chips, MSI, Asus, Abit, Gigabyte, etc... and as I said in that other thread that inspired this poll of yours, all of those companies and other suffered from the bad caps syndrome due to the stolen, incomplete formula.