I've actually never used a samsung, but everything samsung makes seems to be top quality. They are pretty much the highest rated electronics company, especially for TV's, and LG is actually up there too. I've used 2 liteOn's with no problems, I did have an issue with a Sony but it was used when I bought it so who knows how the previous owner treated it so I don't really count that.
And actually 90% of the reason I don't buy Asus is their support is horrendous. If you have to RMA something, be prepared for it to take forever and jump through tons of hoops. Also, they are super picky and reject RMA's all the time and say you misused the item when it's normal wear and tear 95% of the time. I've never had any RMA or support issues with Patriot, gigabyte, ASrock, G.Skill, MSI (the best and fastest imo), or EVGA although they are a little on the slow side.
I just had someone tell me the other day he tried to RMA his Asus motherboard. They rejected it because there was a cut trace on the back of the board....which is fine and a good reason. But I said to my friend, well I've RMA'd boards with ASRock, MSI, and gigabyte where the boards have had physical damage and there's usually a small fee for replacement anywhere from $30-40. He told me Asus wanted $133 for replacement, which was only a discounted price basically it was a $190 board. But the gigabyte board I RMA'd was an X58 and was going for $180 at the time and they replaced it for $40.