The 1/4" Output is the one going to my amp, right? So I will be running a CabSim into my amp that does have a real cab itself? Why would I want to do that?
As usual, especially in live sound, there is a lot of gray area and compromise to be dealt with. Basically, you have the following scenarios:
1. You're recording direct, no amp, use the CabSim
2. You're using in-ears live, no amp, use the CabSim
3. You're playing live, using your amp to carry the room, no CabSim
4. Your playing live, amp as monitor, FOH is carrying the room, use the CabSim for FOH and maybe have a compromise in your stage sound, or don't use it and let the sound guy worry about it.
And this doesn't take into account the Dry output, which opens other routing options.
Depending on how the CabSim is voiced, it may be a non-issue. Maybe it blends with the sound of your cab anyway, maybe you like the voicing as a base tone and leave it on.
All in all, I think this is a great approach. I can't wait to hear it.
One more question for @Sushi Box FX, is the boost similar to a built in Space Heater? or is it something else?