:| The US market XEs came with (still do I think), Continental ProContact all season tires. In 17 and 18 inch for sure (19" is one I'm not sure about).
UK market XE's appear to flaunt Pirelli all season tyres (notice I wrote tYres, for the blokes). Owners like Vespa, CaptainNoddy or PhilB will be able to let you know if the type has changed over the 3 years the build has been around.
I am never a fan of all-season. All season means Master of None, so they will start losing their summer performance sooner than a true Summer tyre, and their winter ability will erode in a shorter number of months than a true Winter tyre.
The reports I read from other UK owners indicate the Pirellis are a good and reliable factory tyre. Here in the US, we are not so keen on the Continental ProContacts, because (depending on your driving terrain, which varies wildly across America), you can physically FEEL the traction and tread fading as the months progress.
Look into Nokian. They make what is starting to be considered an "all season Winter tyre". The reviews are excellent. I'm not dead certain it is made for XE's 17 inch rims though.