Replying to Armada halo/alpha/ar7/thall

so hello,

GENERAL:
i am 6'2", just under 190 lbs and need park only skis. idc about pow-ability or general all-mountain ability.


SKI HISTORY:
ive ridden ar5s in like '03 to '06 and they were great, then had k2 silencers (the all black ones) and currently i ride '08 or so ar6s, also a good ski.


PARK RIDING STYLE:
i dont really hit jumps under 25 ft and they go up to 60 or so, and do also a little bit of rails, but nothing extraordinary. maybe 75/25 jumps/rails.


SHOP SITUATION:
i could get all of these skis for the same money in a end of season sale. cant really test them.


MY THOUGHTS SO FAR:
obviously i could live well with the ar7/thall because i have ridden ar5s/ar6s for the better part of the last decade. but i am intrigued by the whole shape thing of the halo and the alpha. if i go into that direction, i would tend towards the alpha given my size because its a bit stiffer. basically i just wanna know if anyone made a similar switch and did like the alpha in the park.