Juang correctly suggested i7 5820k as the ultimate choice for this kind of budget. Because 1300 euro is good budget, don't think of it as low :- ) If you're not building true universal solution which is equally oriented on gaming/real-time stuff and which would warrant higher-end GPU, you can comfortably fit more expensive LGA-2011v3 platform with the best value oriented 6-core available. I would go for high-quality parts which will serve for years, and if you ever want to dive into more GPU oriented stuff, you will just buy it in next generations as upgrade option.
Example workstation based on LGA-2011v3 platform that doesn't include regular storage:
i7 5820k +/- 400 euro
Any "entry-level" 2011v3 board. Asus is the higher-end choice here, and most popular brand, but if you go with their lower-range Asrock, or alternatively MSI/Gigabyte, all the same good. Asus has the most user-friendly UEFI if that is of any interest.
Asus X99-A, MSI X99, Gigabyte X99 - 200-250 Euro
32GB memory. Go for best-value oriented modules with low-profile modules with no gimmick type of heatsinks. They don't matter.
Crucial, Kingston, Corsair DDR4 2400Mhz (if you find good deal with higher clock, good, if not, don't sweat it, go for price) 150-170 euro
Main drive SSD 250GB, go value-oriented, performance difference is negligible.
Samsung 850 EVO 250 GB +/- 90 euro
CPU cooler: Either high-end Air tower, or CLC system of your favourite brand (Corsair, NXT, etc...). Depends on what you like. I consider high-end air cooling to be personally better choice unless you go for better 2x240/3x360mm CLC systems that already spiral costs into 150 +/- euro territory. We need more budget oriented stuff, but one which lets you overclock maximally and keep it stable&quit.
Noctua-NHD15 +/- 90 euro
Tower: Personal choice. Fractal is great value oriented evergreen with perfect minimalist look, some good silencing and comes with great stock coolers.
Fractal Design DefineS (cheaper brother of R5)- +/- 85 euro
Reputable brand based (Seasonic, Superflower, Corsair, BeQuiet, Enermax,etc..) 80+ standard, at least bronze level PSU. Overclocked i7 six-core will reach up to 300W, similarly can high-end GPU. So look for 650W/760W for some future proofing if you plan to upgrade GPU in future, or want you PSU to ran in semi-passive mode.
Seasonic G Series 650 W +/- 120 euro
(personally, I do always suggest going higher, with silver/gold based PSU, because 24/7 rendering for years on overclocked machines will put higher stress than regular use and gaming, and you will sleep comfortably you have higher-grade hardware (capacitators,etc..), but if budget is concerned, reputable brand + bronze 80+ is OK)
Low-end GPU, because 3dsMax doesn't utilize it any good anyway for viepowert performance (with Nitrous, it's great on low-end card as well) and Corona is pure CPU based and will be in near future.
GTX 750ti +/- 100 euro.
<1300 euros including VAT
Alternatively, you can build more universal machine with better GPU if you switch to LGA-1151 platform, which would yield you only quad-core (but highly over-clockable) and let you buy 960/970 GTX GPU instead.
i7 6700k +/- 350 Euro
Asus/MSI/Gigabyte Z170 motherboard +/ 120-150 euro
You save about 100-150 euros here which you can spend on higher-end GPU.
Alternatively x2 - You can try scavening for used hardware, either full workstation, or parts. Esp. GPUs loose their value quickly today (CPUs don't ).
//Why 32GB memory over better GPU. Because 32GB is easily used in current rendering today, while better GPU (970 vs 750Ti) provides only minimal benefit for viewport performance in newest 3dsMax releases.