Which phone to buy for commuting pilot? Android or IPhone 4s? (Sprint)

Ok, I know there are a LOT of posts on here about this, and I am currently on the thread search reading through them... but just in case one of you has already DONE all this research and really has a good opinion, I'd rather just run out and buy the thing!

I am on a 2008 Palm Treo "Windows 6" phone, which I've liked but is not getting iffy for charging etc. I need a new phone, want to move into the new age. I expect to do phone/text, some email, like to look at an excel spreadsheet on it, and access ICREW for jumpseat and PCS info. And Travelnet or other webpages for commuting info.

Which phone to get? I don't have any other Apple stuff yet...
Thanks for any help or links. I'll be catching up on the back-posts while hoping for some new brilliant post to solve my research problems!