I know several of you guys know a lot about cameras so I'd like to get your opinions on the matter. The wife is looking into getting an intro level DSLR. Personally, I'd like to stick with a prosumer camera (for video and live preview capabilities) ...she's mostly worried about low-light performance.

Some of the cameras I've been looking into are..

Canon Powershot G10
Canon Rebel (several different models)
Nikon D40/40X, D60

What would you guys recommend?