I would suggest you seriously have a look at the rossignol s4... They truly are a great ski and sounds perfect for what your looking for. They have been practically unchanged since the Rossi Scratch FS, the only change is they have only gotten lighter, I owned a pair myself and they are great in the park and rip groomers as they hold a very stiff profile, also bomb proof (mine have lasted 3 season of abuse) they are one of the best pipe skis out there and therefor are light have very low swing weight and hold an edge very very well. been on the x games and dew tour podium the last 3 years (kevin rowland uses them in the pipe).
Granted if you want a forgiving ski that is easier to butter then get something else. I have heard good things about the AR7, the S4 is really designed for an agressive advanced skiier and it wont allow you to 'butter out' a landing
As of the current Rossignol product line there is only one model and that is the S4 Jib although I have seen some websites that have an s4 jib and S4 jib flat which is just an S4 jib that the retailer sells without a binding plate.
Although the website says that the ski has rocker I think that is the tip and tail height (which technically can be interperated rocker) the S4 deffinatly has positive camber and if it does have rocker then it is hardly noticable, which IMO is not rocker just a slightly higher tip profile. I personally interperate rocker as a deliberatly manufactured alteration of the ski to significantly move the contact point of the ski towads the center to improve soft snow or flexible performance (my opinion).
Skis such as the super 7 do deffinatly have visible rocker and 0 or negative camber. tho skis such as the s3 and s1 do not (besides the natural tip and tail).
Ultimatly rocker is a word thrown in by companies to increase the marketability of skis, some skis acually have it and some have so little its not worth noting.