I really liked the Payson reduced core nickels, and the medium lights. The flats are cool. I just received a couple custom sets that Payson was kind enough to put together for me. I'm looking forward to the next couple string changes.
The cross border shipping would give me pause. Back when there were few choices, I would order a box from Dingwall and ad in some other stuff to justify the shipping. Now we can get Dingwall strings from FretNation with free shipping.
I'm assuming the shipping in Canada for Dingwall strings is minimal. I like the Dingwall strings as well, but they are too heavy for my tastes these days. I use the A-C strings for my four string tuned E-G. My all time favorite set up on the AB-1 was E-C with TI jazz flats.
Since you ordered the six string sets, you might play around with the E-C thing. I liked that set up more than the low B.
I've had success with other strings as well, Infeld Superalloy, TI jazz flats (Jason at FretNation can set you up).