#8 and #9 - remove the TAS from the circle. I like the arrows to give a feel of air flow. And the colours are good. But, it also reminds me of the Pepsi logo.
#8, #9 - I like the colour gradient on the top half from yellow to red. Try to add the same to the blue on the bottom. Can you add a light source from bottom left, and a slight gradient from light blue to a bit darker blue? Maybe try some differetn colours in the TAS. They are too blue, perhaps a bright colour gradient so they stand out, or a colour gradient.
#25, #26 - I think its better with the TAS in the circle.
#38 - need to find a colour for the TAS letters that are easily readable. Blue and orange (and green) don't seem to work as they blend into the circle too much. I'm afraid if its a small logo, the TAS will not be visible. Especially when on black/white (gray) photocopies.
Thank you for suggestions for my entry. I did revision #38 with 3 color variations of dark blue. But I can not submit new entries. Your contest in Top 5 phase. only 5 designer (not 5 design) can submit new entry. Thanks.