I have both.:D
Bought a brand new ATV 171 last winter... custom order, custom graphics (Grey Prior Top Sheet, super rare RED bottom).
Rode it twice.
I'm 6'4", 210lbs and I ride really aggressive... I simply overpower this board.
I should have gotten a Split Tail Pow-Stick. (It's what I wanted in the first place.:()
My main board has been a 179 Four Wheel Drive.
I love this board... 4 years old, still the best board I've ever ridden... super clean... never ridden early/late season (No repairs ever needed on base.)
Don't know if I want to sell it, but now that I mainly board in Canada, i NEED a deep Powder board.
Let me know if your interested.
EQ