So I've always been a fan of power pro original (4 strand moss green). Never had issues with it and I trusted it so it's been what I have stuck with for both casting and spinning. Lately with my spinning I've had some issues with wind knots and had to cut a lot of line off so it was time for a respool. A few years back I bought a couple spools of smackdown braid in 15lb test from BPS since they had it on clearance. I've heard great things about it but haven't had reason to give it a try until recently. All I can say is WOW! I can't believe how smooth it feels when casting! No issues with wind knots either. Unfortunately for my wallet I don't think I can go back now... 

I have been die hard Power Pro for muskie fishing for years too. Glad to know there is something else out there...

Smackdown is so nice. I've been using it for frogs this year and it's been great to fish with.