Do whatever you're most comfortable with. Not everyone wants/likes to fish 10# test, especially Power Pro given it is only 2# diameter equivalent. That's a seriously thin line.
I have had a few wind knots with 10#. They're a pain. Bowing can certainly be an issue, but I (try to) keep the casts low trajectory and put the rod tip down right away.
As for "snapping", yes, it can. I've caught some big bass with knots in the line, drag and playing the fish were the solutions. I've also snagged a number of times, but the line is very tough to break on a steady pull. I've straightened hooks on many different leaders. Quick, hard jerks of the line is a different force on the line and can snap it at the knots, or any abraded spots. Of course this isn't 100% of the time. Steady pulls can snap at the knots, too, depends...
Just my experiences with the line. 20# goes on my baitcasting gear, light by some standards, but more than strong enough to bring in some big fish, logs, and waterlogged boots. My PB was caught on an older BC I've got that I had spooled with 10lb Fireline + 10lb YoZuri Hybrid leader, caught the 7.5 beastie who came in with another couple pounds of thick salad slop. Lines held up fantastically.
You sound like you've got a good plan with what you want to do. That's what's important. Fish like YOU want to, not how I do it. But if you have a few minutes, this might give you some additional insight, from Gary Yamamoto: http://www.insideline.net/weeklynews/2008/08-0529.html. It helped me.