What is your suggestion on this?

I want a camera within $500. I prefer long zooms. But I want to know whether a small SLR will complement with its photo clarity and digital zoom. I want to shoot HD videos too and for that zoom should be enabled to be manipulated during shooting videos. My Nikon S630 lacks this. Will Sony HX200V fit for my need? Please suggest.

Added (1). @fhotoace: Kindly go through this:

Neither of the two cameras you listed are dSLR cameras so they lack the large sensors found on dSLR cameras In addition, the P&S cameras like you listed have NO ability to have their lenses manipulated.

$500 is just too small a budget for what you want to do.

My guess is that you came up with this idea to shoot video in HD, but have never experienced doing that with ANY camera, so you are not familiar with the limitations of P&S, dSLR and other cameras that shot video

The problem is you are an intelligent person who is uninformed and all your information has come from comments read here, written many times by people with no experience other that what they have read here.

It is too bad that our bona-fides are not published so you can verify the authenticity of what is said.

So, it is important that you spend additional time doing your own independent research, looking at the cameras websites and hopefully from rereading your lecture notes from any formal education you have in photography.

Don't be in a hurry to buy anything until you are sure you are buying the best possible camera for you and your needs

I feel you may even check out for Nikon Coolpix P510