To be honest, the video card doesn't really matter all too much. The only thing it's used for is the viewport and the interface. All other calculations are done on the CPU, not the GPU. 2 GB of VRAM should be a decent amount. But in reality, it all depends on what you want to do. If you want to have a lot of individual objects in your viewport, than yes, more VRAM would be useful. If you spend most of your time in the render view, then it becomes less of a bottleneck. 16 GB of RAM is good for most things. (A lot of studio workstations have this as default, and go up if it's a dynamics or lighting workstation)