i use 50lb power pro and love it. its extremely sensative, strong, zero strech, zero memory, and the strength-diameter ratio is good (50lb is only the diameter of 12 i think)
only downfall is the green coating that they manufacture puts on it. it wears off shortly and leaves a nasty green scum all over the front of the reel (from the spray when you cast) and the reel seet. if you dont make the same mistake i did and spray/wipe the reel down after each use then you will be fine. stupid me i let the gunk build up. wont be doing that again.
ive never used suffix but my friend had some and it didnt seem to have that coating over it. suffix is probably better, but i like powerpro and will continue using it till i have money to upgrade my line.