Mono's mono, guys. No matter what they tell you, it all has some stretch, it all has some spool memory. None of it is accurately labeled as far as break strength goes, except for IGFA class line like Ande Tournament. Stuff with the same diameter usually breaks around the same point no matter what they tell you the "pound test" is. Stick to the basic, decent quality stuff like pink Ande and regular Big Game---both around $30 for a one pound spool that should last a full season even for a hardcore---and put the money you have left over towards a new rod or reel.
Pink Ande and Big Game both resist abrasion better than the soft stuff like Yozuri, Jinkai, Trilene XL, Stren etc and so on.