hey mate how are things?
i cannot offer up as much advice as many many others on here as i have typically been an option rider, and i dont know what has happened to them this season?
if you've been using a 159 these last 12 years, technology would have come very,very far and as far as i have read (i have read ALOT of literature on this subject as i have just recently had to make a decision as to what new board to buy), the rocker tech is not only very versatile, but also fun and forgiving.
if you've been riding the same board for 12 years i would say for sure give rocker a go- its the most significant design innovation in snowboard gear that i've become aware of in how many years, might as well see what all the fuss is about.
as for technine- once upon a time i was a technine binder fanboy. recently, their bindings have been reputed to look sooooooo ''ill'' but be pretty crappy quality. for that reason i wouldnt touch their boards. i cannot compromise on board quality because, like you, i am heavy (although much heavier than you).
id suggest going a stiffer freestyle deck- apparently the lib tech skate banana has been stiffened up this season? the other alternative, as many would suggest, is a never summer evo-r or an slr. i just bought an evo-r in 161.
i think you'll find alot of literature on here attesting to the quality/ rideability of both brands.