As most 3D Apps you'll have a nice and smooth active work experience with high clocking cpus, but you don't necessarily need lots of cores to be able to work smoothly.
Of course, things like rendering or baking, anything that can be easily parallelized, can make great use of either a lot of cpu cores, or is easily spead up by a gpu.
If you don't want to do much rendering at all, I'd recommend getting a slightly stronger cpu so your active modeling work is faster. If you do want to do some gpu rendering with CUDA for example, then you can lean a bit more towards getting a strong gpu.
Overall your suggestions are god, but the 3600 cpu with the 1650 super seems like the better fit for your kind of workloads.