Worth upgrading from 450d to 600d or 650d?

Timbukto wrote:

That is true, if you sell your old kit with some old lenses, you can try to snag some great deals on t3i/t4i and you can come out with an extremely cheap upgrade. I've gone through several cheap t3i deals already and have no complaints for performance vs price. In addition you can even take the money you save and technically buy some decent noise removal plugins that also give you more of an 'edge' over other 'stock' cameras. The Rebels are always a rather easy sale on craigslist with decent resale, yet surprisingly the purchase price if you get rebates and good deals are just as cheap!