So I am looking for a new phone...

I am in need of a new cell phone. I bought an itouch in December and really like it. I am now looking into replacing it with an iphone now that the data plans may be more affordable: http://news.cnet.com/8301-30686_3-20006780-266.html?tag=rtcol;inTheNewsNow. I already have at&t so I won't have to switch providers. I just dread calling at&t and talking to customer service about my options. Bad, bad, bad customer service - maybe the "sales" staff will be more competent.