For a Christian band, Sympathy really sounds soulless...do not like. Go with some of these:
Gory Blister - Skymorphosis
Sickening Horror - When Landscapes Bled Backwards
Unreal Overflows - The Architecture of Incomprehension
Blastfame - Abstract Evolution
Fractal Point - The Bizarre Machinery of the Universe
Obscura is like a worse version of newer Necrophagist with nothing really interesting going on and SoP are fun and catchy for a while, then they just start to sound like a clinic.
Anything by Death or Cynic. For me, Chuck's work with Death is the definition of technical death metal. The boys of Cynic worked Chuck and his influence is there as well.