Replying to My skinny ass= needs a flexy ski

Alright, so I'm 5'9 and 120lbs... I got some Head Madtricks as my first set of twins last season and needless to say they are stiff as hell for me... So, I wanna get some fairly flexy skies and I'm pretty much gonna be in the park... I really want to get the 06/07 invaders but the 178 length is a bit long for my taste...

so I was thinking about the 174 scratch fs but i've herd that they are pretty stiff, any thought on that...

the AR5s... how are those like in the stiffness factor

any other skis that are fairly soft and between 174 and 178

I don't have much knowledge on most skies, so help would be very appreciated... thanks