#70 is fine, but please use blue Pantone 2765c (CMYK 100-95-00-35) and try to make abstract a bit more based on the shape of building or current logos (not literally), check for outside photo on www.orea.cz/pyramida
#82 and #91 seems to be the same, what I would like to see is that the abstract is narrow - if you put lines going up in the middle of Y and D, abstract should fit between them,
middle part of abstract is too wide, still prefer #82 where on left side of abstract is fine, just make the middle part more narrow so it fits between midst of Y and D