Here are a few i enjoy, the second one is actually a band that my friend is in that is kinda growing here around memphis, they should be pretty good one day.

Scar Symmetry:  Morphogenisis  http://www.youtube.com/watch?v=mebSi4PDC34

Here Lies Heart:  Don't worry about hypocricy, there is always room for more  http://www.youtube.com/watch?v=szP4Q6folf8

Suidakra:  Shattering Swords  http://www.youtube.com/watch?v=sTvzlePDA_c

Punch Brothers: Reptilia(cover)  http://www.youtube.com/watch?v=qayc6yJXG-8

Warning: This video contains awesome

http://www.youtube.com/watch?v=Spv5l48yyMw

Sometimes you just need to relax, this song is there to help you out:

http://www.youtube.com/watch?v=Nevnq7MvVTI

Blows my mind..

This is a great song I just recently stumbled upon.

Schoolboy - Checkmate  http://www.youtube.com/watch?v=ccRYhdNLh0M

http://www.youtube.com/watch?v=J-DaQ5qmeS4

http://www.youtube.com/watch?v=3Q3C04yV9lo&feature=related

Asis is a producer on Youtube who oversees a great hip-hop music competition aptly named The Battle of the Beats. 

Here is his channel page below: 

http://www.youtube.com/user/AsisGalvin