First Build could use a little help

Get low profile ram.

Get Z97 and 4690K

Don't get hybrid drive if you have large SSD, just get a normal HDD

getting the newer R9 270 may be cheaper

you may want to get a better GPU at the expense of other parts (eg: downgrade to FX 6300 or 8320 and get a 280)

760 isn't much better.

R9 280 or 270X

I would suggest getting something slightly higher than a 7870 and the i5 if you can afford it. I have an i7 and regularly max it when rendering panoramas in photoshop or converting movies. Even battlefield 4 can come up to around 70 percent usage on my i7 (3770) and thus it might be advantageous to get a better cpu. My 7870 hawk is still kicking butt (60+ fps average, 54 fps minimum on bf4 non mantle ultra w/ no aa, 40fps with same settings and a resolution of 4800x1080) but I can see it having problems in the future. I would suggest getting a non xfx card because I have had problems with their coolers and something from gigabyte (three fan cooler) or msi might be a little better, but I would still recommend getting something a little more powerful right now.

Could you please share you estimated price point that you would like to stay in?

As a final recommendation from my own experience, skip the hybrid hard drive, and I know this is going to sound crazy, but use a ssd cache. I have 2x1tb hdd in my system in a raid 0 with a 40gb ssd cache. I get 190mb a sec sustained reads, and super fast access to commonly used files. The difference is that for something like an extra 30 dollars compared to the standard 2tb hdd you mentioned, you are going to get the same storage, but it should be faster, and it will also have 5 times the ssd cache,, and the ssd cache is faster. 40gb ssds are very cheap right now. If you need any help with setting this up, just say so. Unless you really absolutely need the ssd speed consistently in everything, I would go with this option, and then put the saved money towards the graphics card and cpu.

I think that you don't need close to that psu for what you are doing. My system is as follows:
core i7-3770
7870 Hawk OCed to 1250/1450
16gb of ram
3 7200 rpm hdds
1ssd
2dvd drivesd
various pcie cards

Even with all this stuff above, I don't have much need for a psu stronger than the 460 that is currently in there, but if you really want to future proof you system for pretty much every computer that you ever have, it wouldn't be that bad of an option. Personal comment: Corsair has treated me well so I would recommend them.

As a final comment, get a wd blue drive. I have a seagate and a wd blue. The blue runs quieter, and also uses 1tb platters so the read speeds are faster than my double disk 1tb seagate (which i think the 1tb seagates still are, correct me if I am wrong) and they roughly cost the same. Plus they run just a little cooler.

The i5 and i7 have similar performance.