I'm thinking of getting a 600D but have a few questions

I've currently got a Rebel XS (1000D) and whilst it's a decent enough camera, I want to make the upgrade to something that does decent quality video recording.

I'm not planning on making anything outstanding with it, it's my first step into the world of video so I'm not looking to buy anything really expensive. At the same time I want something that I won't just want to replace in a few months. There's also the case of whether the kit lens is good enough for now, or whether I should upgrade to something else?

It's essentially between the 600/650/60D and wanted to know any advice that anyone may have for the camera!

As a side note, I'm looking to pick up the Rode Videomic as well, just to get some decent audio recording as well. If anyone has any experience with this it would be great to hear feedback as well!

Thanks all for the help!