Just saw this thread for the first time... I'm sure some of these have already been mentioned, but here's some electronica that I feel comfortable recommending....
Sasha - (start with the Airdrawndagger EP and the early Renaissance and Northern Exposure DJ mixes with John Digweed, and the Xpander EP)
Layo & Bushwacka (pretty much anything of theirs is good)
Orbital (I like all of their albums)
Kruder & Dorfmeister (Austrian DJ and remix duo)
Way Out West (Nick Warren & Jody Wisternoff are also great DJs)
Trentemoller (Artist/Producer)
Booka Shade (Artist/Producer)
Banco De Gaia (Artist/Producer)
Rabbit In The Moon (Confucius & Bunny, amazing stage show and LOTS of remixes)
Masters At Work (Artist/Producer duo)
Alex Moran (artist/producer)
Miguel Migs (artist/Producer/DJ)
Massive Attack (just get some...)
Chus & Ceballos (awesome house remixers)
Francois Kevorkian (remixer & DJ since 80's. LOTS of remix credits for mainstream artists)
The Orb (several good albums)
Hybrid (Theme from a Wide Angle, with Moscow symphony, AWESOME album)
Leftfield (Leftism LP is a staple)
LTJ Bukem (very smooth Drum & Bass DJ, easy to listen to)
Bassnectar
Circulation
D:Fuse (DJ and producer)
Carl Cox (AMAZING DJ)
Sven Vath (DJ & some tracks)
BT (as an artist, especially the IMA double CD, not so much a as a DJ though)
Brothers In Rhythm (incl. Dave Seaman, one of my favorite DJs of all time)
Here's a few Record Labels with to check out:
Bedrock (John Digweed's label)
Hope
OM (Miguel Migs & Jay J)
Greyhound
Poker Flat
Hallucination
Red Ant (Pete Bones' label)
Waveform (Francois K's label)
Platipus
Sumsonic
Plastic Fantastic
Yoshitoshi
Renaissance
There are so many good electronica artists, DJ's and record labels out there across so many different genres... This is really the tip of the iceberg and what comes immediately to mind as I take a quick mental inventory of what's in my 3000+ record collection as I'm sitting here on the couch... I know I'm missing so many more I could and should add...
And if you ever have a chance to go to Winter Music Conference in Miami, you should. The Ultra Festival can be sensory overload and a bit over the top for some. I'd recommend hitting the smaller, more intimate pool and club parties organized by various international underground record labels instead.