the 1606 should do 1200 w/o much trouble, and that should be plenty to get just about everything a cvx has to offer. Even if you assume the HF is 20% over-rated it will still do 1200+.
a cvx will have no problem with 1200 watts..been there, done that //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I think the cvx starts to come to life around 1200 watts.