There are a nearly endless number of styles and colors to choose from, which is wonderful, but may make it hard to come to a decision when making your selection!
The amount of space available in your bathroom is the first criteria to consider in selecting a new lav.
A more ornate style is shown here:
After determining how much physical space you have available, consider color and style; they seem to go together. Do you prefer a sleek modern style, or a more ornate, traditional?
Check out what is available, consider your budget and then do it!