Countertops that are made of the same thing as kitchen sinks ?
What kind of kitchen sinks? Stainless Steel ? Cast Iron ? Acryllic ? Corian ?
The most durable countertop surface out there is of course granite or a quartz. Corian's or any other acryllic/poly blend solid surface is the only thing I can think of that has the sinks also, but that's pretty expensive . Almost as much as granite, but not near as durable.
I'd price out granite just to see where it falls in your budget, especially if this is a house you plan to stay in for a while. If it's totally out of your budget, there are a lot of nice looking laminates and they can be very durable too, you just have to watch hot things, knives, and certain items that might stain, like red wine or cool-aid.