I haven't used the Coreblade, but from the stuff I've read about it it's supposed to be a more modern voice for heavier metal. Extremely overpriced for what it is.
I have two Switchblades, the head and the combo. I've never been thrilled with the the combo. The head with the right cabinet sounds much better to me. I have a Mesa Recto 2x12 that sounds better for the scooped out metal sounds. I also have a Red Bear 4x12 with Celestion G12L-35's in it. Supposedly cheaper Greenbackish speakers. It definitely sounds better for the lower gain sounds. With either one I've been able to get some great 80's metal tones. I'm talking along the lines of Iron Maiden, Metallica, Dio, etc.