^ Good question. You came to the right place. :p I think between everyone there'll be an opinion on all of them but of course people will have their own opinions! :)

I myself own... no Blu-Rays... :(

The one that impressed me the most for it's blu-ray quality was Momoiro Christmas 2012. To me is the one that feels "more HD" They wore some shiny and some fluffy costumes and you feel like you can touch it.

I actually use this a wallpaper from time to time cause I really like it: (I'll put in under spoiler because is quite big)


Onna Matsuri and Otoko Matsuri 2012 were awesome as well (probably Otoko better, but that depends on your taste).

Now that you made me think of it I realized I love every 2012 concert.

Momoclo Haru No Ichidaiji 2012 for sure. It has the Momoclo★All Stars 2012 solo performances.

GOUNN is visually very impressive. I'm definitely getting Momoiro Christmas 2013 next month.

I'd also say you pretty much can't go wrong with eighter of the "Big4" (Haru, Natsu, Otoko/Onna, Christmas) of 2012! To me the 12 concerts still have the best setlist somehow. SummerDive2013 is also a fav of mine, just for the pure epicness :D

I recommend to get Onna Matsuri 2012 if you are an Aarin fan because of the excellent A~rin wa Hankouki perfomance. Or just get it because it is an amazing concert. ;)

And Peach for the Stars is a must-have in my opinion. I can't believe it has only been mentioned once so far. :P

The Haru no Ichidaiji 2011 Blu-ray also includes a letter from Akarin. Too bad a box of tissues wasn't included because you need one.

I think Summer Dive 2011 would be a nice addition as well since it would be their first concert where they sold more seats than the original amount plus a sentai-esque battle and even had to hand-cut the grass on the standing seats for the fans rather than having staff members do it for them.

I would recommend World Summer Dive 2013 since it's probably the concert with the most amount of mononofus gathered in one stadium but I was told it's not really worth it. according to a fellow mononofu, the CG wasn't good and they didn't really utilize the grass and the carts that well even though they somewhat danced on the grass, ran on the track and played soccer in the middle of Pinky Jones. So basically it depends on your end on whether to buy the DVD or not and your own opinion.

MomoKuri 2012 is basically SSA part 2 but with more stage designs, a cartoony battle and including more songs, UFOs, and launching autographed plastic balls at the audience. And it's also held after they were told of their first appearance in Kouhaku which has been their dream since the beginning.
2013 is held at Seibu Dome so it's probably the coldest concert they've ever held until it got really hot and mononofus stripped down from sweaters to tank tops. But they did include snow during Kimi Yuki (for Momokuri 2010, they said they wanted it to snow in the venue and they finally did it but the snow was styrofoam). They also included Twinkle5 having a guest appearance to promote Tenshi to Jump that premiered just hours after the concert as well as the announcement of the venue for Haru no Ichidaiji 2014 at Kokuritsu, the dream they announced after conquering Kouhaku just almost a year prior to the concert. The setlist also included some classic Christmas songs and a very teary Ano Sora he Mukatte where some of them can't even sing their lines without breaking down in tears. I highly recommend it since about 3 hours of it was streamed (the first hour on TV and the rest through ustream) and the setting was amazing.

Kodomo Matsuri mostly depends. 2013 was more kid friendly with the concert consisting entirely of skits more than singing. There are guest appearances and even a dance lesson by Yumi-sensei for the teletama theme song. The main skit approached otakus into tokusatsu but can appeal to kids. Also includes Aarin Robo's debut.
2012 also included skits but were more random and the first one was more rebellious since the girls acted like children who wouldn't listen to their instructor. Songs include some of their solo songs (the one best fitted for rebellious children being Aarin wa Hankouki), Single Bed, Osaretai, CoCo Natsu and introducing Mite Mite Kocchicchi with Pikachu and Meloetta as guest stars.

No problem at all. Have fun with your DVDs/BluRays. As one who can't buy them, I wish you an immense amount of fun, fellow mononofu *^*

Peach for the stars
Gounn tour
Momokuri 11/12/13
Summer dive 11/12
5th dimension tour
Momoclo allstars @ Yokohama arena(my all time fave)
Otono/otona matsuri