If you're placing some heavy multithreaded workload on the CPU for a long period of time and routinely, you may want the 3820 and X79. If it's just a possibility and only an occasional thing that you're doing the rendering and building, the 3770k will be just fine as well.
Personally, I'd go with the Z77 and IB processor. Either way, get a good CPU cooler.
Thanks for the help, everyone. Seeing as I can save further by getting a different z77 motherboard, I might just do that. I'm only starting 3D work, so I won't be doing a lot just yet, and the 3770k seems to be sufficient for my needs as it seems. In the end, gaming is also still my main priority for this build.
Should I come to need something with more horsepower, I'll get the x79 platform. Thanks again for the help, everyone.