I'm gonna have to try that approach to the vocals for Porcupine Tree...
Many years ago, I was given a copy of Leviathan. Because of the vocals, I couldn't listen to it. A few years ago, I was given a copy of Blood Mountain, heard the screamo vocals in the first song and stopped listening.
On Father's Day this year, I was at my local Newbury Comics making a Father's Day Haul, and I hear this awesome music over the speakers. It sounds kind of Toolish, but way more metal. I even thought the vocals sounded like bad Ozzy. I asked the guy at the counter what it was and it was Crack The Skye. I bought it. Then I found my old copy of Blood Mountain, and I was surprised that it has 95% clean vocals.
I actually like Blood Mountain better. It feels more metalish, but this is a very instrument driven band. A damn good one, too!