OK, gents,
My last two personal builds have been on ASUS boards.
I started out the first buld with a Gigabyte board, but it would not support the waterblocks I needed because of poor PCI-E slot configurtions. I went for an A8N-SLI-Premium with a AMDx2 4400+, ended up sending the whole kit an kabootle back to Newegg as I couldn't get a post. I don't know if it was a MB issue or one of the other new components.
Second try on the A8N worked very well, for about 5 years, if not more. The MB/CPU/MEM still work, but were getting too long in the tooth speed wise so I descided to upgrade.

I went with an ASUS RAMPAGE II Extreme MB. Search the HWA Boards for that way beyond crazy experience! ASUS did an advance RMA on the damaged MB, and I had the board by second day air, though it did take more than a week to clear up the RMA acceptance process in which they initially claimed that I'd sent them a board that was not qualified (evidently a auto response, like those of insurance companies), but after review was accepted. The new board has been kicking for about a year now (see BIO).

Insofar as QC, I've had worse luck with MSI than ASUS for MANY years, starting in the mid-90s. On workstations I think that Gibabyte and ASUS give very good bang for the buck, and Tyan can compete (I've only sent back less than 0.5% of all tyan boards) in workstation and server environments, and SuperMicro good as well in workstations and Servers.