There isn't much choice for the sizes in question on the 500X. I had a look before ordering mine as I intend to occasionally do some light off roading. I think I saw Avon Gripsters (a good tyre but don't think the look of them suits) and some Heidenaus that looked like super motard tyres. All the rest seem to be the usual road tyres with bigger grooves like the ones fitted from the factory.
I'm hoping they start doing more aggressive ones soon now that more adventure/soft roader bikes are using 17" fronts. Its the the front that makes it difficult, there are loads to fit the rear.
I'm sure there will be others I've missed, not seen the Shinkos before.