I took a look at the images you provided. I am very well versed in photoshop and illustrator and could easily give you something not only along the same lines as what you want but I believe I could make it even more than what you expect! I believe that in 5 days time i will be able to create a logo that you will fall in love with!
I have designed many posters for my college fests. I know photoshop cs5-6 quite well.
if you want I can mail you the posters I made to be sure about my work