I believe you'll find Winstons like the weight line they were made for. If you overline your new rod it might lose some of its crispness.
Consider a 6 weight line with an aggressive front taper that will help turn over those beefy flies.
Here's a few to consider and further confuse you!
SA Textured Magnum or Titan, Rio Smallmouth, Power Fly or OutBound Short, Airflo Bass and more.
Mastery Textured Series - Lines
Smallmouth Bass - Freshwater Fly Lines | RIO