Fantastic selection of fish - I'm brand new to tropical aquariums and looking at getting a Roma 200L myself. Struggling to get my head around the bioload though.. I selected all your fish on the AqAdvisor website and it reported that I needed better filtration capacity. Are you using the stock U3 internal filter or something else?
Rich, the website you referred to is notoriously inaccurate. Take everything you read on there with a pinch of salt. If you've got any queries, far better to post on here, and have humans advise you than a badly-programmed database.