What camera is best to use?

I want to buy a good digital camera but i have no idea what to get. I want something that takes pictures in complete high definition.something that is good at taking every detail of something and can zoom in pretty good without getting blurry. Also has settings to make background blurry and focus… Do you have any suggestions? Cannon or nikon or niether? Or? I don't really mind what size it is and is there any lenses you would recommend?

High definition isn't a photographic term. Here's a good resource to start with:
http://reviews.cnet.com/...ing-guide/
Bear in mind that equipment can't make you a photographer.

Cannon, Nikon, Sony, Kodak, they are all excellent cameras. You can't go wrong with any of them. Kodak are know for their ease of use. I have one and I love it.

Sounds like you need to read or learn some more
on how to choose a digital camera, and also how to use it.
There are many models by many manufacturers,
so picking one is not easy, but making the best
out of it once you choose it and buy it is even harder.

I would consider Canon PowerShot SD1400IS 14.1 MP Digital Camera
* 14.1-megapixel resolution; 2.7-inch PureColor System LCD
* 28mm wide-angle lens; 4x optical zoom and Optical Image Stabilizer
* 720p HD movie shooting capability plus HDMI output
* Smart AUTO intelligently selects from 22 predefined settings
* New scene modes such as Miniature Effect and Fisheye Effect;
* Low Light mode for dimly-lit situations.