These guys are revolutionizing instrumental rock and merging it with other genres that in my opinion have, until Polyphia, sorely lacked in musicianship.
When it comes to instrumental progressive rock, Plini is hard to beat. His timing, tones, and sounds are unique and something special that you don't want to miss.
David Maxim Micic is not only an amazing guitarist, but his production value and creativity are also things to be admired. For being a relatively little known artist, I would rank his works as elite.