Should I upgrade to a this Mac?

-Hi, I've been thinking about upgrading to a 2.16 ghz dual-core, 3gb, 20 in iMac with Snow Leopard (the white plastic version), which I found a really good price of $400. Is it worth upgrading from my 2.3 ghz single-processor AMD Sempron, 2gb Dell budget machine I bought in 09? I use my computer for web browsing, email, video/audio chat, office applications, making home movies, and the occasional java game. I currently own a iMac G3, so I have already "delve" into the world of Apple before, and I would like to get a machine to replace my current Dell. Is it worth it?Yup if you want to go with me then yes...go for it!!! Apple is worth it. I have been using Mac Book and I have found it to be very advanced and moreover the chances of it being ruined are also very less.No!