Gaming build help

first off, the parts look good.

secondly, don't build right away. wait till the skylake platform comes out and gets benchmarked. seeing how you chose a locked cpu and a entry level z97 mobo, a locked skylake i5 cpu (as long as it performs higher) and a z170 mobo will be better option for you.

that seasonic psu is good but it's an old model. the s12g series is newer.
 

unlikely to be a lot more expensive but we don't have concrete info on the pricing. leaks showed comparable pricing with 10-30 bucks offset. take it with a grain of NaCl. real, retail early parts can be more expensive depending on actual market situation.