if you're decent get the 176. if you're a little inexperienced, get the 171. the 171's are gonna be easier to throw around, but the 176's will be more stable.
you are exactly 174 cm tall...they would be DOPE for you...2 cm taller??? thast perfect...and you have a buffer zone of space just incase you dont like the height to much...but you will...get them true centeredand they will feel smaller.