Define "in that domain." If you mean in the AMD series, I'd pick up an FX-8120 and overclock it. You happen to do one of the things the FX processors are very good at. The FX 8150 beats the 2600K in encoding performance in HandBrake.
I found an article here in Tomshardware that says that a stock i5-2550k matches a stock FX-8150.
If this is correctly, a Core i7 shall make you fly. If you makes money with this computer I shall recommend the faster (and costly) option. It's an investment.