A little help?

So I'm FINALLY eligible to upgrade my phone to a smartphone... I'm so excited! Now the question is, what's the best option?

When I look at the options on my AT&T plan, they're offering

• Motorola Flipside
• iPhone 3GS (technically they also offer iPhone 4, but it's $200 more than I want to spend)
• Windows Phone 7
• HTC Inspire
• LG Quantum

Any thoughts or reviews? Do you have one of these phones and love it or hate it?

I want to be able to surf the web and take a decent picture. And possibly make phone calls. Any input would be appreciated!