Woocommerce - Different currency for different products?

I am developing an online shop that offers 1 product, but there are different prices for different currencies.

For example:

UK buyers - price will be exclusive of tax (until checkout)
US buyers - price will be inclusive of tax (before and at checkout)

What is the best way to do this? Two separate products or one product with variable prices?

If it is two products, how do I make the currencies different on the store page?

Also, the products comes in the quantities , 1-25, 30, then goes up in 10s after this - however each quantity has a different sku, how do I set a sku for quantities?