Did you bring a sample home to try with cabinets? Would have to see backsplash tile with countertop before commenting

It's really hard to tell from those pics, but it seems that the counter is cool while everything else is warm. I'd keep looking, but as jck910 says, bring samples home or take cab samples to the stone yard.

really like your choices so far.

Setting aside whether the color is too cool (which I think it might be, but with photos it’s hard to know; as mentioned you have to bring samples home with you), I think the look of that Helsinki Quartz does not go with your more traditional cabinets. The speckles of that Quartz don’t work with your multi color cabinets. You need something calmer and quieter.

Also, you said “stone” in your subject title and OP. What you show is Quartz, not stone.

As others have pointed out you already have too much going on with three cabinet colors and the countertop is too cool. Look for something much more simple and warmer. Bring either a sample home or bring all three cabinet colors to the stone yard.

The samples are just 4"x4" pieces so it is hard to visualize. Any software you would recommend for visualization?

I think the colors would go nicely with each other. I like lighter colored kitchens. When I am stressing over a decision, I remind myself that whatever I choose will be better than what was there before !