4 vs 6

[opsirc]

Now that the season is over for eyes, was going to get reels ready for next year, while waiting for summer.  I have been using 6lb test but currently only have 4. I use the Berkley fireline crystal micro ice. Try breaking it, cut into hands. Think it would be strong enough. What does everyone else use, and any problems landing bigger fish?

Thanks

[tinker]

I don't fish for Muskies or big Pike but I do use 4 and 6 lbs Suffix 832 braid and have not had any problems with bigger Walleyes or the occasional Northern. I have a couple of rods spooled with 4 lbs Sufix Advance Mono without any break off problems .  After using the Advance Mono since it came out I prefer it over braid . Low stretch , good knot strength and lower $ .