1. I will say yes, but you should probably post the versions.
2. You can edit on the bb and sync.
3. You can setup pop (including Yahoo). The downside is the from and reply address will be your bb address. Or a step better any other ONE address you setup. BBReply and PocketDay both have options that let you change the reply address, but the from address that displays will still be the one setup on the BWC website.
4. I happen to like the suretype, but this is my first bb, so I don't know any better
but I did come from a Motorola a630 with a full qwerty and the suretype is fine with me. Bluetooth is headset/handsfree only, so forget file transfer or DUN.
If you get it, be sure to upgrade to the latest desktop client and bb os.