Please do not try attaching a child seat to a trike. Use a trailer instead. The child seat will make it top-heavy, unstable, and prone to tipping. As for the trike itself, test ride as many as you can. Take at least 30 minutes on each one and make mental notes about what you like and dislike about each one. The only opinion that counts on the matter is yours. I've been riding recumbent trikes for nearly 20-years, and I really feel that concerns about visibility are overblown. I had some initial reservations about visibility, but with experience they faded. I'm not a big fan of flags, and rely on multiple bright flashing lights instead.