Every chipset maker pumps out a lemon once in awhile, with Intel it was their initial rdram offering, the 840, iirc... , or the memory controller hub part of the deal...
Having worked with several different Via boards, I really think that most of the problems come from the boards themselves rather than the chipsets. One of our home machines has a soyo kt133 board- it was a little cranky to set up, but it's been very stable for the last 18 mos., and this is a kid's machine running a variety of games. Recently worked over a friend's system with an Asus A7V- hate that board, it's a pain in the ass, and has never worked right. I've used the KM (integrated video) boards for people who don't game w/o regrets, and the wife has a km266 Epox that hasn't been rebooted in over a month.
So it all depends on what you're comfortable with, either the kt333 or nforce1 will serve you well provided you get a good board. If you're using WinXP, you don't need the 4in1's at all- my last 2 builds with kt266a boards and XP were the smoothest I've ever done, Windows put it all together seamlessly. Scared me half to death...