The first few Heads album do have their derivative moments (i.e., spot the riff, usually a Floyd or Sabbs one)but I do enjoy their more song oriented output.

If you wanna check out a couple of brutal releases by Heads listen to 'Under The Stress Of A Headlong Dive' and 'At Last'. If listened from beginning to end, both can be heavy going if your not in the right frame of mind.

We Descend From - http://www.youtube.com/watch?v=G8nTiKzh6fA
Embyonic Lizard - http://www.youtube.com/watch?v=qkcEn0Qw6kU
Creating The Eternal Now - http://www.youtube.com/watch?v=-HCmzJiDt1U
Spliff Riff - http://www.youtube.com/watch?v=pgbHlReKRuI

Thumbs up for 'Under Sided' too. First album I bought by them after they blew AMT away live (spliff riff was insane that night)