The price of new countertops differs widely based on materials. Stone surfaces, like quartz and granite, are the most durable, but also the most expensive. Solid surface and laminate are less costly but require more maintenance. Ceramic tiles are generally an affordable backsplash alternative, depending on their brand and the complexity of the tiling layout.
If you decide to go with a major remodel and spend upwards of $50,000, you should consider consulting a kitchen designer. A professional designer has the experience, connections and examples to suggest what fits with your plan. He or she can also help you save where possible, so you don't spend needlessly while still getting the final product you want.