The components are most important for what you’re looking for because they bring much better reliability. Except, as others have said, you don’t want a tri-bike and as they’ve said I’d keep my options open and not limited to those 3.
Look on eBay other places like the European sites like Wiggle and Merlin and get one with a 105 groupset and you’ll be good. Maybe Tiagra, but I’d stick with 105 or that level in other brands and up.