I would recommend a filter, they offer decent protection for your front element and your peace of mind.
Is there any specific reason why you want a UV filter in particular? If the only reason for getting it is to protect your front element then a neutral colour(NC) or protector filter will do the job just fine. They cost half the price of a UV one which could be the difference between a B+W and a Hoya.
If you're looking at Hoya, you should get a multicoated(HMC, MRC for B+W) filter and the "Pro" in the name indicates that it is of a higher quality. Try and get the slim variant if you can as this would reduce vignetting although some don't come with a filter thread meaning that you can't stack filters on top of it so watch out for that if this ability is important to you.
A good quality filter should not degrade image quality and most of those you mentioned seem to be ok. Not so sure about the Hoya G-Series and HMC non-super pro though....