I would certainly advise a ~256GB SSD for your system drive and keep the barracuda's only for your media (1 backup 1 main yes?). I've had good experience with seasonic, corsair, and antec for power supplies but really I'd advise checking the models with the best rated and most customer reviews which should help you find the most popular models. Otherwise, if you're not in a rush and can wait for when individual components go on sale slickdeals or similar sites can help your budget a good deal.
Your price point is fine, particularly if you were thinking about dual GTX 780 TI's - I was a bit unclear from your post.
MB - change to x79 motherboard; Asus is good
CPU - Intel 6-core; i7-3930k or i7-4930k are both excellent choices and 6-cores will help vs. 4 core CPUs
GPU - you can save some cash here unless DVD render outputs are really important for you; a single GTX 770 2GB will work very well for most workflows; if a 4k monitor is in your future however, go for a 4GB or 6GB GTX model
RAM - 32 GB is good for Premiere, but for After Effects you may want to go with 64GB; 1600 speed DDR3 is fine; there is not much real world difference between 1600 MHz and anything faster
boot drive - agree with other post - definitely get a 256GB SSD; I like Samsung 840 Pro, Seagate 600 series, and my new favorite is probably the Crucial M550 series
2x 2TB Barracuda - good; I would do a RAID 0 on these for the speed benefit, but using them as separate drives could work as well
HAF 932 - oldie and a goodie!
power supply - I like the Corsair AX and AXi series a LOT; a 750 watt high-quality p/s would probably work, but the more watts you get the quieter it will be under load; I have a AX-1200 and it is pretty silent until it has to work really hard
Totally agree with the SSD suggestion and would like to point you Harm's Tweakers Page on our PPBM7 web site. Do not know what you are going to be editing but studying his many suggestions you might be able to scale back on the GPU with the quad core CPU if your media is not too demanding. It will also give you a better idea on the disk requirements.
Here is the heart of his work showing you the variables when configuring a system that everyone should consider:
AE and C4D is all CPU threading and ram. Video cards wont help the performance. Octane is used with C4D for GPU acceleration if you end up there. Beyond that I would suggest a 6 Core on an X79 if AE is the focus with 64GB of ram.
I'm finally on a system that's got some juice to it so it's worthwhile having the right layout of files. The one thing that is a bit confusing is the variety of nomenclature of the "background" files. So ... within PrPro we have settable locations for:
Media Cache Files
Media Cache Database
And of course, the original footage or 'media'.
I've spent some time reading articles around here and on the tweaker's page, especially the "Disk Setup" page. I think I've got an understanding of the idea, but want to check.
-system is twin-SSD's in a RAID 0 configuration for a usable 220GB (idea by my builder, a gamer & designer of video utilizations within business websites); holding programs and the Windows cache/pagefiles.
-Cache SSD of 60GB, set currently for Media Cache Files and Media Cache Database.
-3 TB Western Digital Black disk set for current project and media files.
- 500MB Velociraptor currently set for video & audio preview files.
There are two large eSata-connected drives for backup/local storage plus a USB-connected external for all "general" documents, word-files, downloads & etc ... don't care about speed there. Basic system data is an i7-4770 on an Asus board w/16GB RAM, EVGA GTX-770 w/4GB vRAM.
Any suggestions on configuring file locations? I also run Speedgrade and a bit of AeFx ... especially concerned with Sg's operations also.