What line for trout

What are some of the different types and brands of line you guys use for trout. I have to re-spool all my reels before the season starts and was wondering if anyone has any ideas. I usually use Berkley Trilene 4lb. monofilament. I have been thinking of switching to some brand of 4lb. fluorocarbon. I like that fluorocarbon is almost invisible under water, especially for spooky trout. What's your thoughts?

4 or 6 lb test X50.  Only available at Cabelas but its wicked strong!  My tournmanent partner casted in a tree and pulled the whole boat loaded down with gear to the tree with 8lb.  Casts super smooth.

Catchin, I am really interested in using the X50. I have just heard that when you spool a small ultralight spool with fluorocarbon, it causes problems. I don't have any experience with fluorocarbon line. Just don't want any hassles when it is time to fish.

spiderwire ez mono 4 or 6# 4.96 for 330 yds and it actually good line for the price, good knot strength, casts a mile and its strong

bcain, If you go with fluorocarbon line. Be sure to wipe it off before you quit for the day. Small bits of dirt and whatnot stick to fluoro and can cause the line to shred. If you keep up on it, it's ok.

P-line  CX Premium. Its a flouro coated copolymer. You'll thank me later :) Casts like a dream, super low memory, invisible under water, and hella strong!
 
Its really amazing stuff and costs about $9-$10 for 300yds. I prefer the clear florescent color and buy it in 1000yd spools @ $17. I use it on about 80% of my spinning rods.

No need to spool up your whole reel with flouro. For stockers in PA I'd fill my reel with Berkley XL 4lb and then attach a few feet of 2lb test fluoro to the line with a bloodknot for the leader. I'd guess that less than 1 percent of the trout stocked in PA are larger than 2lbs, and besides, with the proper drag and play you can land a monster on that set up. The old world record brown (40.4 lbs) was caught on 4 lb test line.
 
Freshly stocked fish aren't necessary line shy, but they'll learn to look out for it if they're caught and released a time or two. Not to mention that line with a smaller diameter causes less drag and makes for a more natural presentation. In the past I used to experiment in heavily fished DHALO's by changing the material (mono or fluoro) and strength/diameter (6/4/2 lb) of my leader without changing the lure. Caught many more fish with the smaller line and the fluoro; usually markedly so.

Jefff, I was just looking at the P-Line Cx copolymer. I was wondering if it truly is as invisible under water as fluorocarbon. It said in the book better casting too but I know all companies say theirs is the best. I think I might go with that. Gonna go tomorrow and start getting some of the supplies I need.

i use #4 spiderwire, if the water is clear i will tie on a couple feet thinner tippet.