Haha, actually Skarmory's Special Defense is higher than Haxorus' Special Attack (and equal to Haxorus' Special Defense).
Hydreigon is better, however the need to breed it just for Dark Pulse irritates me somewhat.
Overall, Druddigon is still my favourite Gen V dragon-type :D
Oh, and seeing as this is dying, and I doubt anybody will object:
Reshiram or Zekrom, which do you prefer?
Personally my vote goes to:
Right from the offset, even when I didn't know which was which, I wanted the white one. And, despite me owning Black, and having only had possession of Zekrom for approximately 3 minutes in my lifetime (got one, traded straight back on the GTS for a Braviary), Zekrom hasn't got that "I can't have it, therefore I want it" effect on me that many version-exclusives, particularly version mascots, often have on me.
Plus, if you ask me, it looks a lot more majestic. Zekrom has a neat design, sure, but Reshiram has this whole aura surrounding it...it oozes class and legendary.
N.b. please, don't all copy me with massive images. One of Zekrom will suffice, but then people are going to get irritated at me for kicking off the trend, and you for following it. Use sprites, they're arguably cooler when you see the fire/electricity coming out of their arsses tails.