Thank for comments Joker and Suman!
Orel: i also have the CW31 and a metalhead... and i tell ya i just love the id america Sparks sound!
3 times better than the CW31 to my opinion...much deeper, smoother, bassier (not bloated), cleaner, engaging...
my only gripe about the Sparks is the cable...which annoys me a little...it just gets in my way all the time and
doesnt lack microphonics.
but the suond is great