Ok here's the deal.....Used to be a road warrior.....haven't traveled much over the last two years, just got the word that I will be hitting the road quite a bit, Mostly domestic trans con from Boston with some Europe trips......I have been a United 1k in the past but looking to change.....I've heard their are better programs then mileage plus and Star alliance.......Please..... any suggestions and why? keep in mind home base is Boston.....

Thanks,