#19 - Not keen on this because, it looks like 'Colour Sou' and it reminds me too much of a similar logo (CNBC?) I do like the clean, modern simplicity look.
Thanks for the entry Cornelius - would like to see more ideas from you!
#79 - This is clever. Not liking the dark green background though - too masculine / old. Prefer #79 out of #81, #78,
#88, #87 - Prefer this design to #19. May look brighter / cleaner on a white background for this logo style. The coloured 'U' & 'p' are a bit hard to notice though.