Samsung makes about 3-5 different displays at each size. Typically you would say "I just picked up a 46" Samsung TV!" - someone may reply: "Which one?"
Your response (proper): "I got the 46D6000" - or just: "The D6000 series"
It lets someone know you have the most current model in their 6000 series. They also have a 6400, 7000, 8000 and maybe even a 9000 depending on the size of the display. They also have cheaper ones still available.
As for 'factory settings' - Now is a good time to do some research and educate yourself. Most TVs are not properly calibrated or set accurately from the factory. They have built in settings and presets which you are free to use, but it is strongly recommended, that if you are not happy, that you go ahead and read the manual and setup a custom setting which is more to your liking.
Let's be clear: If the factory got it right, they wouldn't let us change those settings!
If you aren't happy, why the heck haven't you changed the settings?
They are there to be changed, to be played with, to be adjusted. To your liking. If you like a bit to much red in skin tones, then that's your choice and you can make it happen. It's not like you are getting into the factory service menu to do this. These are standard user adjustable controls.
As mentioned above, a calibration disc like Avia is an excellent tool to help you on your way to understanding how to properly color calibrate your TV, but even then, you may want to adjust things differently to suit your personal tastes.
Don't be afraid to try some different settings out and ask questions.