Which camera would be better for price and quality?

I want a camera I can use under many different settings but is still easy to use. I prefer optical zoom and want to be able to take photos in a range of light settings. I have narrowed it down to about three and was looking for suggestions.
Nikon - Coolpix P510 16.1-Megapixel Digital Camera
Fujifilm - FinePix HS30EXR 16.0-Megapixel Digital Camera
Olympus - SP-810UZ 14.0-Megapixel Digital Camera

What are some opinions or suggestions?
>>> Which camera would be better for price and quality?

Nikon P500 HDR mode gives me two pictures?

Hi everyone, i own a nikon p500, when taking photos in HDR mode it takes two shots, and then when uploading i have two pictures. does the camera merge these two at all? or it is just setting you up, and then you have to do the work in photoshop?
Added (1). Thanks for the reply, but i don't think that is the case because for night shots one shot comes out dark and the other very light (a noticable difference, i think its for the shadows or darkest areas), and day action shots actually show the subject having moved.
>>> Nikon P500 HDR mode gives me two pictures?

Nikon P500, settings for astrophotography?

I have a Nikon Coolpix P500, a tripod and fortunately am alive to look at the sky outside my house. I want to do astrophotography. I don't really know what the settings would be to get the best of the camera's capabilities. Please tell me the settings. And no, I cannot afford other camera at this time.
>>> Nikon P500, settings for astrophotography?

You're opinion on the nikon p510?

Do you all think is a good camera to just take pictures of everyday things like graffitie and just dope pics?
>>> You're opinion on the nikon p510?

HELP buying new Camera?

I'm thinking about buying a new Nikon L100 coolpix 10.0 Megapixel and I was wondering if that works with a Mac computer?
Added (1). I have a Mac computer and just wanted to know if the Nikon works with Mac!!!
>>> HELP buying new Camera?