Are you trying to get a good sound with headphones or could you still use a whisper quiet amp? I've had passable results putting an MXR 10 band EQ in the loop of my amp to give it a more pleasant tone at low volume. It's the only reason I've kept that pedal actually, I never use it otherwise. The feel is a little more immediate than impulses but the improvement depends on the latency you get from your computer. If you can only use headphones I'd probably just stick with the amp/impulses setup and save the cash if you don't need any extra features like the Kemper offers.