i5 2500k mobo/gpu/power supply---which to get?

I am going to build my first "high end" gaming machine. I have almost no personal experience with the below parts or any components that are this expensive/high end since i wouldn't exactly call myself "wealthy". I have extensivly read other posts and reviews about these parts for the past couple of weeks but i need advice tailored to my specific situation. I would very much appreciate some advice from personal experiance.

that said........I want to build a computer centered around an i5 2500k- thats not optional.

I need a recommendation for a motherboard that is around $150 - $200 (there are so many i cant really tell which are better) I've worked out that ASUS seems to make the best quality-- true?

I need a graphics card that could run skyrim: somewhere around a Geforce GTX 460------is there a better/cheaper option? perhaps a Radeon? I would love your opinion on the best card that is around this quality and pricerange ($180-$200) that would go best with the i5 and motherboard you recommend.

Last but far from least- I need you to tell me about a power supply that would go with the above components. I have absolutely no knowledge about power supplies and ones I have bought in the past were not very good. I am in desperate need of assistance regarding this. Price range of no more than $80

I WILL overclock the i5 to around 4 ghz (thats why i get the 2500k) and most likely the GPU later on ( but the GPU overclock is optional)

Thanks!