Been getting really into the whole electro scene lately, plus I love dancing so it was bound to happen eventually. I'm more into the progressive house/trance than straight up house or trance, but it's all good. I'm assuming most people know the bigger names like Tiesto and Armin van Buuren, so here's some from other great producers...
Trance:
Gareth Emery is a sick DJ... saw him spin on New Year's Eve, most epic experience of my life, no joke. Check out "Metropolis" and "Mistral", pumpin tunes!
Ashley Wallbridge - Chimera, Shotokan, Harrier
Alex M.O.R.P.H. - Sunset Boulevard
Sander van Doorn - Bliksem, Ninety
Arnej - The Return, Dust In The Wind
Ferry Corsten - Twice In A Blue Moon, Shanti, hell most of his stuff is top notch
Menno de Jong - Last Light Tonight
House:
Armand Van Helden, great dancing music!
Pryda - Waves, Genesis
Jerome Isma-Ae - Hold That Sucker Down (intense track!)
Wippenberg - Chakalaka, Pong, both catchy as fuck
Deadmau5 - not a huge fan of most of his stuff, but he's got some good tunes. "Faxing Berlin", "Arguru", "Strobe"
I could go on and on, but that should do for starters.