Replying to 171s or 161s?

I'm going to buy a new pair of line invaders but im deciding whether to get 171s or 161s i'm about 5-9 and 140 lbs.. the only reason i ask is i did have a pair of line mike nicks 171s and i felt like i was dragging them behind in the air but i hear the invaders are the lightest ski on the market

well let me know what you think

I don't know how to put this, but I'm kind of a big deal... People know me, I own many leather bound books...