It is customary in Colorado, that the seller pays for the Lender's title insurance policy (more expensive) and the buyer pays for the Owner's title insurance policy (less expensive). Here you will find a listing of title insurance companies in the Denver area, as well as pricing that is registered with the State of Colorado Department of Regulatory Agencies (DORA) and a couple title insurance contacts I have worked with.
Denver Title Insurance Companies
Title Insurance Rates on DORA
Chicago Title of Colorado
America's Home Title (affilliated with Home Real Estate)
Land Title Guarantee