I am certainly no expert but I would say by the look of the kittens they will not have the contrast you are looking for or the rosetted pattern. They look quit dark to me and I think you would be looking for a light background. I have had 3 bengals and will soon be collecting our fourth, sadly our silver boy we lost last year. I purchased him for a breeder who specialises in silvers (they do import all over the world if of any interest!). I would think it would be worth seeking out this type of breeder and if necessary waiting your time until a litter comes available that has what you a looking for. I totally agree that personality and character are more important but if you are not happy with the look of your fur baby it will disappoint from the start and that is unfair on the cat.
This was Harley my silver boy .... (he did not have big rosettes was more spotted )
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But deff hads the wild look ...
Have you considered snows? In my opinion (and that is all it is!) they can look more 'wild like' than any of the other colours as they can look very much like the snow leopard, we have a seal lynx called Chester and his markings are by far the best of all our bengals (however they are pale to start and the markings can take a good while to develop so you would certainly need to look at the parents and previous litters and have trust in the breeder if you went down this route) here's my little snow leopard if it helps x
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Whichever you choose I think best to wait your time until you find a breeder you are happy with and they will advise on a litter/kitten which is likely to have what you are looking for. Good luck xx