Another vote for big game 

I use the BassPro Excel line a lot because i get a huge roll of it at a really good price.   i never have an issue with it breaking.   PLINE is my favorite by far but twice the price

I like Sunline Natural Mono 16lb for the following reasons compared to other Mono:

Smaller Diameter

Above Average Sensitivity

Less Stretch

More Supple

Great cast distance

More Manageable

Strong Line

Inexpensive

 

Second on my list, Senshi 15-20:

Pros

Small Diameter

Slightly better sensitivity than Sunline

Less Stretch

Florescent Blue

Great cast distance

 

Cons compared to Sunline

Less Manageable

Not as Strong so I go 20lb instead of 15. But Diameter is still less or equal to most 15lb lines

More expensive