Samson Nova Braid XLS Easy Feel. High friction through the blocks. The other common mistake is up-sizing lines for better grip. As a rule, go one size smaller than the rated maximum, and never the largest that will fit.
Go over the part that you will actually handle with 200 grit sandpaper. Yup, put some wear on them on purpose (not to much--you can always go back). This is what the racing pros do every time they board a boat with new lines. They can't afford to loose control of the spinnaker halyard on a quick hoist.
As a cruiser, you can skip this on sheets--they'll get scuffed up soon enough. But the furler line is great candidate. We like a slick, skinny furler line so that it will feed with minimal friction and not suffer from overrides on the drum, but we regret the choice the first time we have to roll it up in a good blow. Yes, we could use the winch, but there is always some risk of twisting the foil if we underestimate our strength, which is easy to do with a winch. Pre-scuffing up the tail is the answer.
And while we're speaking of speed tweaks, my book Faster Cruising for the Coastal Sailor is now available on Kindle through Amazon. Enjoy.