congrats man. i just put one of these on layaway at guitar center yesterday too
played through it again with my own guitar just to make sure it was as godly as i remembered it and yep, it was. i originally wanted to get the combo for the portability factor until i read a review of it in guitar player and the only knock they had was that it was heavier than hell. you think the head is heavy? try lifting the combo. i don't think i've ever tried to lift a 2x12 that was so heavy. but head is pretty heavy too. i think i'll eventually opt for a 2x12 extension, but until then, i can just run it through my 4x12.
anyway, that power scaling power grid is amazing. much more versatile than just being able to cut the amp down to half or a quarter power.