I like to use a fluoro leader because while power pro is very strong, I have found it to not be very abrasion resistant. I love the way it casts and the sensitivity.
As for the first question i cant really help but for the second try some trilene xt for spinning reels, I have trilene on all of my reels (xl on baitcasters) except my fliping reel, and my swimbait reel
I use Mcoy line on my spinning gear it has zero line memory and has yet to let me down.
as far as a floro leadre I would pass but I hate floro. I broke off more fish while using that junk in 1 day than I did the entire season after i trashed it
It's all about confidence. I used to not use any leader with braid (and caught fish) until I read that a lot of people do use one. After I read that, I didn't catch a fish until I started to use a leader.