"Dear Google - please cause me some problems"

You didn't mention:
http://www.e-frenchsound.com
--- this puts you in the running for a duplicate content penalty/filter.

Why do you want more than one domain? Of what benefit is it?

IMHO, focus on one domain, get links to that one domain --> don't make it complicated and don't invite problems.

As for the keywords you are focusing on, I would forget them and focus on some others - I am not too familiar with that industry, but would ave thought that those keywords are extremely competitive.

CBP