Sorry for the delay in answering you. My wife had to leave on an emergency (death in the family), so I have been focusing my time with the kids and out with them. This is my first free chance in the last couple days.
To be honest, I don't know if a cooling pad is going to make that much of a difference. I have one here (several) that worked like a charm with my GX7, however, the best thing for the CX7 seems to be just elevation.
As for the laptop bag - I still have my Targus bag that I had with my GX7/EX7 systems. I absolutely love it and it holds not only my laptop, but my keyboard, books, etc. DEfinitely great for a trip.
Since you already have purchased the Audigy and some speakers - that makes up for the weakest part of this system. My problems may have to do with being a bit deaf, but man... it just sucks. I have urchased a simple Sony active speaker system to have with it. I don't use the laptop in an area where it is on speakers all the time, nor do I have the space. So I wanted to get something small and this works great. Audigy will come after the paint job!
In any case... just some of my notes.