Hi. I've recently bought a Nikkor 24 - 70mm f/2.8 ED Lens, and I definitely want to put a filter on at all times for protection. After doing some research, i've nailed it down to 2 contenders. Which do you think I should get and why? Hoya HD Professional Protector Filter - 77mm or Hoya HD Professional UV Filter - 77mm Thanks for your help in advance.