Whispbar S5/ Cargo basket combo help

Hello, i am new in this forum. I am the proud owner of a 2012 Ct 200h and I am currently looking to add some options to the car. Looking to hear from someone who may have chosen the whispbar roof rack with a luggage basket carrier. More specifically, what size/brand would be a good option for the CT and this particular combo setup. Thanks in advance for your input.