I use a fractal X-Load or the line out of the PS100 for the DI feed. In both cases, I have a 4x12 connected to the speaker thru of the load box, so the 4x12 is the real speaker load. The X-Load/PS100 are great on their own, but I like the idea of using a 4x12 to load down the amp.What are you guys using for capturing amps, between a head and cab? Kemper makes a DI that looks like it'd work well.