Thats better....
As I said on the other thread, my preference is for Ultima Power Match copolymer (meant for carp). Have used rio fluro, double strength, drennan sub surface, maxima, fulling mill copolymer, sport fish copolymer, hardy copolymer, etc etc but have come to like the Ultima.
I mainly dry fly fish spate rivers (which vary from liquid mud to gin clear) and Scottish Lochs and have never had any problems with copolymer (including sea trout and herling on dries in day light).
To be honest, the tippet material is not so important as it's diameter and the drag on the fly. Fish ignore 'natural' features which go with the current and show no 'unnatural drag'. The thicker and stiffer the tippet, the more likely there is to be drag, which may be invisible to you, but at 2 inches, the fish can see it and runs for cover. Therefore the higher the b/s to diameter usually the better.
For a #3 rod and a single fly, 4lb tippet is okay, if you are fishing a team of wet flies/nymphs, you need to go up to at least 6lb to account for the effects of the knots for the droppers.
While a team of wets can be fished on a level leader, I always taper the leader to a least a degree. For a team of wets, I will still do the four feet of 15lb and then 2ft 7lb to first dropper, then three foot of 7lb to tippet or next dropper.
For a single dry/nymph, I will do four feet 15lb, 3ft 10lb, 2ft 7lb and then a tippet of 3 feet of 4lb.
If you get 4 spools of copolymer tippet (15lb, 10lb, 7lb and 4lb) that will see you through 99% of your fishing needs.