There will be two more models coming in grey and blue dials with patina steel cases (as I know). If you check Panerai web site, it looks like new Radiomir models will come soon, currently there are very few pieces.
I can say that GRII never disappointed me if you are looking for a pocket size street photo tool, the price is 1/5 of Q2, but of course Q2 is a different animal.
I also lean towards Q2 because I don’t need to change lenses for the type of photos I shoot (street, travel and family photos as you mentioned). Also monochrome version of Q2 is also very interesting, I could get one and and also a GRIII for color ones😀