I have never used a Blackberry but from what I know of them their email system was/is superb in its heyday but since Android which integrates directly with Google you can just setup a Gmail account and use IMAP for your mail. Couple this with Google Apps so you can use your own domain name and I seriously think "how is Blackberry still going?".

I currently have the HTC Wildfire S which runs Android and I am in love with it, simple and easy to use and does what it says on the tin.

JGM.