ASUS A7N266-VM (nForce 220-D) : If you don't need integrated graphics and can live with 3 pci and 2 memory banks. Integrated graphics of this mobo is GF2 MX200 class. Since nForce 220-D has no dual channel memory controller, it will hurt performance quite badly if you use integrated graphics. $73 at Newegg
MSI K7N415 Pro or ASUS A7N266-C (nForce 415-D) : Integrated graphics free and with 5 pci and 3 memory banks. Has dual channel memory controller, but it doesn't have any impact in performance. both are $100 at newegg
MSI K7N420 Pro (nForce 420-D) : With integrated graphics and dual channel memory controller. Worths the extra money if you use it's integrated GF2 MX. If you use integrated graphics, you have to consider some performance. I am personally using this mobo.
Among KT333 mobos, MSI KT3 Ultra (and Ultra2) is most stable. Good performer and inexpensive. $82
<b><font color=red> Long live piracy! </font color=red></b>
I agree that the Asus A7N266-VM is a good, reliable board...granted it isn't for everyone. All together I've found that Nforce boards are very good quality. I was very impressed with a Shuttle motherboard (AK31) KT266A that I used for quite awhile... in 6 months I never had it crash once, I don't recall even touching the reset button in that time. I used the shuttle board with an Enermax Power supply that was NOT approved by shuttle, but I had no issues whatsoever. WinXP also played a major role in the system being stable. I used Crucial memory too, but I've also had good luck with Dane-Elec, Corsair, Samsung, Kingston and Smart Modular.
AOL-For people who like to pay extra for their SPAM
I just got an ASUS A7v333 last week, and it's been good so far. It's gone through a few revs (mine is rev 1.04), and it's gone through a number of BIOS updates, so it's probably more stable than some of the newer boards. The CPU overheat protection is definitely a good thing too, especially if you're an idiot like me who mounts his heatsink wrong the first time.
As most posters in this thread, I recommend the A7V333, I'm using that board myself and my system is fully stable even if i'm running my Duron Morgan 1GHz @ 166MHz x 6 undervolted to 1.375V using Samsung PC2100 memory. That's what I call stable operation under extreme conditions.
BTW most stability issues are too often linked to flawed installation of drivers and junkware by the end user that then blame hardware for his/her misunderstanding of software and OS management.