New gaming PC to build in two purchases

Approximate Purchase Date: This week
Budget Range: 650-750
System Usage from Most to Least Important: gaming
Parts Not Required: keyboard/mouse, monitor, PC case
Preferred Website(s) for Parts: newegg.com
Country: USA
Parts Preferences: none
Overclocking: NO
SLI or Crossfire: NO

So I'm building my PC in two parts to spread the cost out a bit.
This is what I'm thinking of for this month:

CPU: Intel Core i5 2400 LGA 1155 Boxed Processor - $149.00
http://www.microcenter.com/single_ [...] id=0354590

MB: ASRock Z68 Extreme3 Gen3 LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard - $121
http://www.newegg.com/Product/Prod [...] 6813157271

HD:Western Digital Caviar Blue WD5000AAKX 500GB 7200 RPM 16MB Cache SATA 6.0Gb/s - $90
http://www.newegg.com/Product/Prod [...] 6822136769

RAM: 16gb (2x) G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) - $92

Windows 7: Microsoft Windows 7 Home Premium SP1 64-bit - OEM - $99
http://www.newegg.com/Product/Prod [...] 6832116986

Total Initial cost: 551

I would like to get this initially and hopefully use it with my old PSU which is this: ENERMAX Noisetaker II EG495P-VE 485W

I can just use the GPU integrated into the CPU and that doesn't require a big new PSU right?

And then next month I can pick up a good $250ish video cards and PSU?

My last PC lated a solid 5 years on a NVDA 8800gt before things started crapping out so if I can get 4 years out of this new system, that would be awesome.

On that same note, is the Intel Core i5 2500k worth the extra $30?

Thanks a lot for any responses. I just want to run this system by someone who keeps up to date with any recent HW changes. i've built a couple of PC's before but my last one was literally 5 years ago.

thanks guys.

Everything looks good for the most part. A 485w PSU should easily be good enough. If you are waiting on a gpu you may want to look into waiting a couple more because the GTX 6XX and HD 7XXX series are coming out over the next few months. The i5-2500K is only worth $30 if and only if you are planning to overclock. The only real thing to think about is getting a 16GB(4x4GB) set of RAM and not 2 8GB(2x4GB) because the manufacturer will guarantee working compared to 2 of the same sets. Their shouldnt be a problem with 2 of the same sets together but you never know. Also in all honesty, you only need 8GB and you can just save getting the extra 8Gb for later down the road like 2-3yrs down the road if needed.

I was shooting for 16g of RAM only because its so cheap and if I can get a kit right now, I figured I wouldn't have to add any ram over the life of the system (hopefully). Would 8g still be sufficient a couple of years down the line or is the extra $40 worth future proofing.

I'm definitely not going to OC the system. I'm not really into it - i just need to slap it together and make sure its stable. Not a huge fan of getting inside the case and tinkering with it to squeeze out extra performance. Only do it when I have to fix something.

What's the deal with aftermarket coolers? I see a lot of people using those now. Are the stock coolers horrible?

Samdsox, is that MB compatible with the integrated GPU on the CPU? I don't see a DVI port on it...

Looks to me like there is a HDMI port. One could use a HDMI to dvi adapter. Only one output though.