To start off, Dancing Astronaut just posted an excellent remix of Avicii's "Street Dancer". Check it:
Avicii - Street Dancer (Tristan Garner Remix) (Preview) by Tristan Garner
Up next is a great collab between Tiesto and Mark Knight. The intro is a bit long but when the synth and vocals start to kick in, it really takes off:
Tiesto vs. Mark Knight ft Dino - Beautiful World (Club Mix) by Dj-Claudio-Olliveira
Finally, my friend AH showed me this dope remix of Illmerica by Wolfgang Gartner. If you don't have the original I can't recommend it enough. Make sure you listen to this remix on a system with good bass because otherwise the sax will drown out the bass.