In the above pic you have the following:
Looks to be a ULE body warp fed left for the Q-loader.
front gas-thru grip
Answers to your questions:
Automags do not need expansion chambers. Don't use one with HPA, and don't use CO2 at all. You can easily get a gas-thru grip that you can run lines to so you don't have the big macro loop.
The above valve is an x-valve. It is not a classic valve. A classic valve will shoot as fast as you can pull the trigger. An x-valve can "bounce" the trigger and actually shoot 15+ BPS if you set things up correctly (need a RT Pro+ valve, and 800+ psi output reg on your tank). I would not suggest getting a lvl 10 kit for a classic valve, but if you are going to get an RT pro, emag or x-valve they usually come with one.
I don't use a q-loader, but I have seen quite a bit of people using them. I can't help you out with the performance of those. Most of the q-loader setups have a warp feed on them as well. Not sure if you need one in the above setup or not.
Automags are simply designed, easy to work on, and easy to tune to perfection. Let me know if you have any further questions.
I buy and sell mag parts..
AO Feedback +20/-0