If you are going to use a pre-determined position, I highly recommend some sort of EQ. I guess I'd recommend it in any case. If ease of use is a priority, I'd recommend getting your hands on the best version of Audyssey you can find. The SVS to come out could do the trick, but you'll need a laptop. That looks like Classe gear if I'm guessing, and I have no idea what kind of RC that stuff has.
I wouldn't worry about having it close to components. It'll be fine. Things that shake seem to be dependent on the frequencies anyways. I also use a JL, and recently it was a window at the opposite end of the home. I've even had my projector shake on a few occasions.
What model is that center speaker?
For corner loading, the benefit of SQ comes from higher SPL efficiency, since that means lower distortion. But, as mentioned, the modes that are excited are often localizable (in my case, always so). People seem to succeed more often with corner placement once they have significantly treated their room.
