I have a Fender 351, Dunlop Ultex Jazz, Red Jazz III and a Black Jazz III. The one that gives the best tone and complexity for me is the Fender pick especially when using low to mid gain. The downside is because of the flex and size its hard to do 16/32 notes. Next is the Ultex Jazz but I don't like the pick noise. I can make the Fender pick sound like the Ultex but its not as fast. Red Jazz III's are super fast that's why shredders love them but IMO they don't sound good w/ low gain, with uber high gain it's perfect since the distortion has covered up the actual sound of the guitar anyway. Black Jazz III I'm not too fond of.