Here are my considerations:
Sejuani +interesting skill set, cool design -never played
Graves +strong, do well with when free -own plenty of other ranged ad carries
Volibear +cool, interesting skills, good ganker -limited play (1 game) jungling can be eh
Talon +seems to be pretty strong -never played
Xerath +long range, high damage -not super exciting
Ahri +fun design -limited play
Lee Sin +strong, good ganker -older champ, jungling is eh for me.
rest of champs i dont have but aren't really on my list:
So based on what i have said and your knowledge who would you recommend to be the best purchase for me at the current time?