Hey Rich, thanks for the answer.
I didn't buy the bike yet, some things delayed my process for getting the licence, which is on track now again.
After putting some thoughts into it, I'll take none of the above, but will settle for the Honda-Sundiro Shadow 150cc http://www.honda-sundiro.com/pro/sho...=112&ClassID=3
I needed a good comfortable solution for a lovely passenger ;-)) , and the rear seat of the CBF is...small I dare say. For the Yamaha YBR, the only back rest or sissy bar available would be a top-case, which is a big no-no forme. It's convenient, ok, but it's so ugly on the bike I cannot get myself to buy that...
I also tried this one http://www.honda-sundiro.com/pro/sho...D=94&ClassID=3 but I didn't like at all the handle bars, could not turn sharply without putting my elbows in my ribcage...
Felt right away at ease on the Shadow 150, same for the girl on the pillion seat, so...

If everything goes smoothly for the driving test, I should be ready to buy the bike at the end of Feb. or beginning of March. Will keep you posted. ;-))