Ok, that makes sense. If you're after credits, you can see by what just happened in the dual with Joker - it's all about the GPU power.
So...I'd go with less of a CPU and more GPU if that's what you want. That is also true now for lots of CAD and Photoshop work, because the latest versions all use the GPU to accelerate renderings.
If you had a specific program in mind, however, we could see what the ratings were on different CPUs to give you a ball-park chip to shoot at cost wise. For cost/performance you typically want to go with the third chip down in the lineup. Current examples of this would include the 5830, the X6 1055T and the i7 950. All are the "third chip down" in their respective lineups. Now, there are faster out there - but buying those are never the "best bang for the buck!" Now gee...how would I know THAT? hehehehe