I don't know why you wait for HD anyways... theres no need for that, I watched Gattai's releases at first, there is no difference except one thing. Gattai's subs are worse.
especially the songs are poorly translated imho
are Gattai's really HD? Or just upscaled stuff...
btw gg releases are: # Display: 848x480 (7-10), 1280x720 (11+)
http://ggkthx.org/macf-hd-ni-naru1.jpg
http://ggkthx.org/macf-hd-ni-naru4.jpg
http://ggkthx.org/macf-hd-ni-naru2.jpg
so, just go with GG now ^^
I don't think that Gattai's are better animation wise (episode 11+)... and [gg] make the best subs in my opinion
weren't Gattai the one who translated "point" as " . " in a song?