I like the idea of using two cabinet colors, but would make sure there is balance using the dark gray. For lighting over the peninsula, one centered above the two seats works for me, but using two smaller ones seems to be the standard. I think a waterfall edge would look sweet on your peninsula, and the frosted glass uppers are a nice touch. I could go either way on the Caesarstone.

If you want something trendy, you probably don't want something gray. Gray is coming very close to its expiration date- it has already expired at the very high end- expect to see it's demise down the food chain within a few years.

If you love gray and it suits what your kitchen, then go for it. But if gray is your choice because you want to be on trend- you will be disappointed irrelatively short order. For example I love white and gray kitchens, no matter what and white happens to suit my kitchen, so I am good whether its trendy or not.