I have a 2G iPhone and haven't had any problems that the 3G users are having... Right now you can find them pretty cheap on ebay. Agree, it depends on what your wife wants and needs. I've been very happy with my iPhone, and for my needs (just personal) the email is great! It's like looking at it on the computer except simplified and easier to read - I never check it on the computer anymore..
I would rather be rock climbing