Like Kezo, I have had both with and without but to be honest, it is a feature I use all the time and love it. It depends however on a number of factors, but personally, I don’t think I would have another car without it unless I was forced.
The best thing you can do is look on YouTube for reviews of the cars you have selected, and see what they say about the reversing cameras. Or if you can, perhaps have a look in person, and see how you think they are.