Menh, Trance is too mainstream... you want some GOOD electronica then get a hold of some good D&B, Breaks, Jungle, or Electro.Then you can get into some of the more obscure stuff too...I'd suggest listening to anything by Ninja Tunes: http://www.ninjatune.net/home/
William.. I quite like Tiesto..but he has become so commercial now.. kinda like Beckham status, totally overrated IMO. Silence is my favourite by him (Delerium and Sarah McLachlan), followed by Adagio for Strings..(link below) that is a freakin' awesome track!
I love Trance! It's about the only music my wife and I agree to listen to.Check out these two sites:http://www.karmasj.comhttp://www.internetdj.com