Motherboard and CPU cooler advice please

Hi All,

I recently lost my motherboard to unexpected power surges, power cuts and the lack of a UPS. here's my config:

Corsair GS 600 PSU
Intel i7-2600k
Zotac GTX 560 Ti
2x4 Corsair Vengeance (1333 MhZ)
2x2TB Seagate Barracuda 7200 RpM hard disks
Cooler Master Storm Enforcer

I'm a bit confused between the p67 and the z68 chipsets. Please suggest a good motherboard across a couple of different price segments.

Also, I learnt that the stock cooler for an i7-2600k is not up to the mark, so I might be going for a new cooler. I saw this post and am considering either the CM N620 or the Noctua U12P SE2. Are there any other models that I need to look at, considering the post was last edited in 2012?

Thank You