32 GB RAM isn't too much.
You may want to look into a hex core instead of a quad core.
the cpu will be most important for premiere export and AE. stepping up to an x99 build with an i7-5820k may cost around 5-10% more in total build cost, but is almost 20% faster. anything after the i7-5820k will become expensive for cost vs performance. a gtx 950 or 960 should work fine since your projects wont be effects heavy. if you plan on using ray-tracing in AE, the gtx 900 series do not work with that. you would need an older gen card, something like a gtx 760. there are lots of x99 build threads here to look thru if you want.
don't bother with all-in-one water cooling unless you are doing max overclock, then go for a big radiator like the corsair h100i or better. the big air coolers will do just as good if not better than that corsair h80i, but wont leak and wont be as noisy. if you plan on keeping this computer for a long time and/or having it running while you are away from the computer, you will defiantly want air to avoid problems a leak. noctua, phanteks, and be-quiet are some popular brands that make large 140mm fan heatsink coolers.
Hi, in this test (sorry in German)
The difference between 6700k und 5820k is not that big. Is the 5820 still so far ahead?
What about this?
Intel Six Core i7-5930K Processor
32GB DDR4 Memo
3TB Hard Drive + 2x 120GB Solid State Drive
NVIDIA GeForce GTX 980 Graphics
I would build the system myself which almost the same parts or similar (maybe better) and increase the RAM to 64 if i can. Also SSDs either more GB or m2 based. hard drive would be a WD black probably.
traveler, those benchmarks do show the i7-5820k more like 10% faster, but i don't think those are overclocked benchmarks? i can't read that webpage.
keiranpetal, the i7-5930k is similar to the i7-5820k once overclocked. the extra cost of the cpu is to pay for the extra pcie lanes, 40 vs 28. if you don't plan on multiple video cards and other pcie cards, then cpu to cpu the extra cost doesn't make much sense. for ssd's, samsung 850 series are some of the best, the pro versions also last alot longer over the evo. if you plan on buying a m.2 ssd, the samsung 950 pro will be out soon. the gtx 980 would be overkill for what you say your projects are, the gtx 970 would be a good option if looking for faster than the gtx 960. the 32gb of memory would probably be more than plenty for your premiere projects, you can always add more later with an 8 memory slot x99 motherboard.