I do not do screw retained crowns unless it is absolutely necessary. That is my preference. I do not think they are too bulky.Many doctors are using all porcelain crowns(Procera--made by Nobel-Biocare)-this also depends on your bite and the position of the implant.
Thank you so much for responding. Can you elaborate at all on the reason you aren't using the screw on? I am thinking the cemented is what I should get.