Yeah that is the cpu, again it is out of stock.
A Chipset is a group of chips/ intergrated circuits etc that work together.
Here we are working with the 9xx series chipsets, the 970, 990x and 990fx. the 990x and 990fx allow for CF and SLI at least x8 by x8 whereas the the 970 one of the pci express slots runs at x4.
As for that selection of mobos i cant see the difference tbh they are all the same model number.
I think it may be best to go the intel route as there is quite a limited AM3+ Mobo selection to choose from, the z68 chipset is intels current enthusiast platform it will set you back around 50 euros more than than the p67 chipset but is designed to get the best out of sandy bridge and has some cool features but as a standard user you may not notcie the difference.
The I5 2500k which you will need if you are going to oc
That is working out at around 350 euros for the cpu and mobo.