I ran pe8 over the pop10 with no issues at all. For casting 120gm poppers, the pop10 is fine and I think the pop12 may struggle to load it. You will have to go to 150gm as a bare minimum with the pop12 I think. Where are you fishing and is this your first GT rod or experience. If it is, you are honestly better off with an all round rod, ie. the pop10. It takes a lot of power. Ideal styles of poppers are cuberas, Adhek Viking, Venus, cuttle, etc. The pop10 will still allow you to work most stickbaits, while the pop12 is very limited in this ability.