The highracers (like Bacchetta) are not all that low, I am on a par with DF bikes on my Bacchetta Corsa. The highracers are a little more "technical", but if you can do Yoga, you'll pick it up pretty fast.
There are also some long wheel based bikes that lend themselves to being socked - socks are highly visible.
I have a flag on my trike. Sometimes I actually feel safer on the trike, because cars "can't see me" they give me a wide birth.
Where do you live now (not Paris ?), there are lots of recumbent groups around the US and many bent riders love to pontificate and will happily let you try their bike.
I love my bents. Sold my DF a year ago, less than 2 years after buying my first bent. I'm never going back.
Check out BROL
www.bentrideronline.com
the forum there is very active and the main page has lots of information and reviews. Also a for sale board may have a bike for you that won't be quite as expensive as a new one.