Shame you can't arrange the England friendly in Manchester, seeing as at least one of your players can't remember where it is!!
You can consider going for some sun, but I don't think Barbados, Cayman Islands or Phuket would provide much competition.
I'd look at other teams in the top 10. Italy, France, Germany, Netherlands should really test your players and tactics. Of course, don't forget to take your passport and pack a bag, just in case you get stuffed. You'll soon be on your way