The traveling circus skis are new so I would be weary... they might be awesome but more times than not newer skis suck for a year or two until the kinks are worked out.
As for the K2's - I have the 179 silencer (2011 model now re-named K2 sight) with rocker tip and tail very similiar to the domain. They are super light and super fun in the park and on hardpack/groomers... of course they are weak in pow do to narrow waists (85mm). Two of my friends have domains and they really enjoy them.
Skis are all about personal preference. What have you ridden and what did you like? How much do you weigh? What speeds are you getting up to? Where do you ski? how big of jumps are you hitting? What are the biggest tricks you throw? etc... all these details will help us help you decide.
But in general...
Sth's are good. The 12s are cheap right now online ($125 shipped) but the non driver sth12 toe isn't as good as the driver 12,14, or 16. I only know 1 guy who has broken sth16 and he skis like an idiot...
Griffons are okay - I have broken a pair and some of my friends have too... but I also have a pair on my atomic blogs and I trust them pretty well - they have quite a bit of plastic and can break easily depending on your weight and skier type. I wouldn't give them the nod as a park ski binder if you're hitting large-ish (55+ foot booters and weigh 150+lbs).
I've never heard of rossi azium's but im sure you meant axiums... they have tons of versions and some (px 14 II px15 II px18 II) are all metal and REALLY strong but very heavy. other axiums go down to 9-10 DINS all plastic and are shitty so it depends which model you're looking at.