metallifux :
are there any disadvantages of the Nvidia chips over the AMD ones?
With an AMD CPU, if you're going to run SLI, then you need an Nvidia chipset to do it, additionally, as far as overclocking is concerned, if you plan on doing that, the Nvidia chipset does just fine, I have successfully OC'd my AMD 965 BE to a stable 4.2G on aftermarket air cooling.
As far as there being any other disadvantages, I'm not aware of any.