308 for me, i'd definately be interested in 6.8 if the US allows the ammo to be exported here. Last I hear was they were thinking of declaring it a millitary round, but I also heard that argument was losing.
As for Canadian gun laws, if it looked scary it was either classed as prohibited or restricted.
Thing is, some of the new stuff is a different design and does not fall under the old classifications. The stoner M16 design was deemed restricted, so anything directly derived from that design is also restricted. but the XCR and 180b operate different enough to avoid the restricted classification.
I think the Liberals have been too busy trying to ban all guns rather than update the classifications in the C.C.