Sonic does need that classic early 90's house soundscape, Hataya had it perfectly with SCD. Listen to Chigago house, such as Frankie Knuckles and The Nightwriters, or acid house, it fits Sonic perfectly. I would post a YouTube vid of "Only The Strong Survive" by Frankie Knuckles but I'm on my iPhone. If anyone does care to look it up, it sounds very similar to Green Hill, not so much the melody but chord progression in the background. I have never studied music so perhaps I'm describing it wrong.