Ordered the 123 because of size and brightness. I have plenty of AA, 2AA lights now and want something small and bright. I do have the EZcr2, but the MiNi 123 is slightly shorter although wider. The 123 batteries aren't that hard to find, especially over the internet. RCR 123 are slightly harder to find, but I have some of those already, and you can get them with protection built in too.
My approach would be to cover many different types of lights. On this board, it sounds as if people will get 10 of the same basic light with the same batteries. That seems rather redundant to me. Besides, in another year there will be plenty of newer better toys out there to purchase.