Well if you going to paid with altcoins then why choose XRP only? Just because of the how faster is transaction? I dont think that it is true excuse about it because if you are going to be paid then doesn't mater how fast you get paid, what matters is that you get paid!

I think ETH would be the best currency to accept as payment. It is far safer than XRP and it is ever green coin. You can even earn some more interest when you will hold it as compared to the XRP. So thats my choice.