I haven't actually used both, but I can vouche for NF3 as being an overall good chipset. I had a Gigabyte K8NS Ultra NF3 mobo (skt939) and it was a pretty good mobo.
The only problem that I found with it (and any other NF3 motherboard) is the incompatibility it has with Nvidia 6xxx series vid cards. When combined, gameplay is somewhat handicapped by what seems like intermittent low FPS. Every once and a while, there will be a short pause in gameplay which would seem like your computer trying to catch up and load the next set of textures that it needs. In reality there is a mismatch between the vid card and the chipset. However, this is remedied by going with a different series vid card, using an ATi vid card, or using the VIA chipset.
Intel E6750...........PSN: ELBATROP
XFX nForce 650i Ultra
Patriot PC2-6400 8GB (4x2GB)
36GB WD Raptor
Samsung SyncMaster 931c
Samsung SyncMaster 750s
Windows 7 Home Premium 64