Question about Nokia N95

Hey guys:

I have saved up about a months work salary for the Nokia N95...
I wanted to ask some experts before I purchased the phone on which version I should go with.

I was told there are 3 versions of the Nokia N95...
I have T-Mobile now and I will need the phone to work overseas as well.
I travel to the Middle East, Europe and I live in New York.

Which is the best Nokia N95 version for me?
Where do you recommend I purchase it for the cheapest price. Thank you for all your help guys I really appreciate it.

where are you going to be using it most?

where do you need the 3G services to work most?