Well if you think about it the only way you are going to lose oil pressure real fast on the road is if one of the cooler lines blow. Maybe if the rear main blew completly out but I have never heard of that happening.
So if your oil cooler lines are in good shape no worries, it hurt buying them but man those fresh cooler lines look good under my SDL's bumper.
Brian the switch that sets that light off my be faulty. I usualy keep my oil around the 3/4 mark and I have never had the light come one.