Long lead Lines that match flat halters?
When I see a show halter with matching lead line the line is usually rather short, flat, leather, and has a chain. Are there any that are between 12' and 25' feet long?
Some of the obstacles require you to stand 10' away from your horse with a loose line (backing), others require at least 4 feet between the handler and horse.
In my opinion a nice rope halter with a rope line that has a suitable feel for the obstacles would look nice and appropriate, whereas a show halter would look mismatched, or crossing disciplines.