i know you are aware on the puffers so i wont go there..
what i did want to comment on was about the Valentini Puffer
there are more reef cautious.. i know a few people that have had them eating polyps.
post recent was a friend who got one for her tank, and it ate all her zoathids.
she wasn't sure if it was the puffer or not, but she brought it back to the store, and when it was being acclimated back to the
LFS tanks, it puked up a bunch of polyps.
again, just be cautions with puffers in general