Your question is very difficult to answer, given how little you gave about what your aspirations are, other than to take great landscapes, and starting from a point-and-shoot (film?).
If you aspire to become an Ansel Adams, then the digital darkroom (DD) is just as important, or more important than the camera, and that can mean a substantial investment in software and a computer with enough power to do the job. And whether you're talking about the camera or the DD, the learning curve in digital is steeper than with film. On the camera side, you need to know everything about exposure, composition, metering-mode and lens choice as with film, plus a lot more about the digital processes available to you that don't exist on camera with film.
On the darkroom side, digital processing is mechanically easier, since you don't have to worry about chemicals and temperatures and immersion times, but the twin hurdles of software and digital technology (graphic arts) have many more options, complications, and procedures to learn, and it will take more of your time.
If your intent is to hand your memory card to a processing lab to get prints and use the camera output for your web posting (another digital discipline), then you need only worry about the camera, and the computer you use to access C-Net now will probably suffice for posting and e-mailing your images, the graphics software that came with it being sufficient for basic adjustments in image crop, brightness, contrast, and color saturation, but even there, without monitor calibration knowledge, you're only guessing if the image will look the same on anyone else's screen as it does on yours.
Digital sounds great when you think of the saved lab costs and instant gratification, but if you want to control your final images, you're going to have to buy into a lot more than the decision of what camera to get, because that's just the beginning on the equipment side, and the time spent to make the decision on that will be a drop in the bucket to the time the multifaceted disciplines of digital photography and graphic art demand. Maybe that has something to do with the number of people taking advantage of the great buys in high-end film cameras now.
But the rewards of digital are just as great as they are for good work done on film, when you can see your images on the screen looking as good as they do coming off your printer, and those prints look as good or better than any you ever saw from a lab. It takes commitment and a lot of work, and money, for the full suite with a quality camera, and that's what you have to decide about before you can make the relatively simple choice on what brand and model you put to your eye.

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