I cant see investing in end of life socket 1155 technology on a new build.
$366 for MSI Z87 G45 w/ 4670k .... nuthin else comes close in this price range (Great OC'ing, military grade components)
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.1392846
$400 The MSI 770 is clocked 79 Mhz faster for $10 less and unlike the EVGA SC series, it has a custom PCB and beefed up VRM toi handle the overclock
http://www.newegg.com/Product/Product.aspx?Item=N82E16814127741
I do find that faster memory does impact gaming performance.... misconception to the contrary comes from looking at average frame rates .... where more, faster and lower CAS memory has an impact is in minimum frame rates. Still.... I dunno if it's worth investing in much faster at a $1300 budget
$70 for DDR3-18866 CAS 9 is a steal
http://www.newegg.com/Product/Product.aspx?Item=N82E16820226223
$240 Corsair 500R / HX850 combo gives you a highly rated case (9.25) with a 10.0 jonnyguru performance rated PSU
http://archive.benchmarkreviews.com/index.php?option=com_content&task=view&id=767&Itemid=61&limit=1&limitstart=5
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story5&reid=299
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.1390833
The Fractal R4 / MK 3 comb above is also very good choice if ya need to stay under $1300but I think the bump up from a 9 to 10 on jonnyguru performance ratings for the PSU and benchmarkreviews bump from 8.65 to 9.25 rating on the case is worth the $40 price difference, so if ya cana afford the $40, Id move up.
A 128 GB Samsung 840 Pro and 1TB WD Black gonna set ya back another $240
http://www.newegg.com/Product/Product.aspx?Item=N82E16820147192
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136533
A top end cooler adds $30 and a DVD Writer adds $17 after $3 coupon code
http://www.newegg.com/Product/Product.aspx?Item=N82E16827135204
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065
All that puts me $63 over ya $1300 budget but Id be hard pressed to pick something to eliminate. The one thing Id say ya would notice the least is the HD / SSD combo. I have similar performing SSDs / HDs here next to an identical box with a SSHD and the only difference I can perceive, with a stop watch , is a bit less than a 1/2 second in boot time. This would shave $105 by taking out the SSD and HD anbd replacing them both (-$240) with the hybrid SSD/HD Momentus XT for $135
http://www.newegg.com/Product/Product.aspx?Item=N82E16822148837
That's leaves ya with $42 left under budget which would almost let you upgrade to a Phanteks PH-TC14-PE cooler and still meet budget (New Total $1308)