Question on Sprint durability and GPS access?

Some people might recognize me from a recent post in the Nextel forum. I was looking at Nextel phones for durability but was concerned about coverage.

I have been thinking about Alltel, and am still considering them, but having checked out the Sprint SERO plan, its very inviting, especially since Alltel only has marginally ruggid phones (compared to Nextel) which don't SEEM that more tough than Sprint's phones. Any thoughts?

What does everyone think of Sanyo's 2400 phone?

Do any of the available SERO phones have GPS functionality through the included data access?

Is there a sturdy phone in the SERO list?

Thanks again everyone.