Which longer park ski for me

Ok so heres the deal. I have a pair of 176 07 dumonts centre-mounted as my park ski and a pair of 179 obsethed as my pow ski.

I am 5'11" and only around 150lbs, I may get up to 160lbs by winter but not much more.

The thing is I dont do super tech stuff on rails and want more of a jump ski 20-30ft tables thats easy to spin 3s and 5s.  The dumonts drive me crazy as I always feel like I am gonna go over the bars and they get deflected so easily. 

I tried the 09 dumont (181) with a standard mount and while it was better than my own skis, with a mount that far back and a super sharp hooky tune on them I couldnt get that much of a feel for them.

So , next season I can get K2, Line, Atomic, rossignol and salomon cheap.

I was wondering though whether I would be better getting an ar6 181 or is that much longer than the salomon 181 as I hear armada measure long. Is it worth paying $500 for the armadas or should I get some k2/rossi/salomon etc for $250-$300.

basically will a 181 armada etc feel like too much ski and will I still be able to butter at 150lbs.

A bit cryptic I know, but any help would be great.