So many to choose from, help!

Hi, I am sure many of you are tired of these posts, but for those who can bare another, your opinions would be much appreciated.

I am currently 20 yrs old (male), from Perth Australia. I am looking to travel once I finish my Uni degree in late June 2008.

I am a very keen clubber, and to be honest, i'll go wherever DJ Tiesto is playing at the time (Watching countless youtube videos doesn't satisfy me). I know he plays mainly in certain parts of Europe, but also America. His schedule doesn't go past 2007 I don't think.

Anyway, perhaps if we leave Tiesto aside, which European tours would be best for me to go clubbing in London, Paris, and Amsterdam - and last at least 3 weeks? I hope to go with a few mates of mine.

Thanks in advance.