I just recently got an RS in candy red ! Coming from an ego-t this things rocks slapped a Boge LR 2.0 carto on it... vaping heaven!!
That's a good combo at 3.7v. You might try the 1.7 ohm smoke tech single coils madvapes has too. They hold a little more juice and perform very well.
A red one is next on my list. I work where there are thousands upon thousands of miles of copper, steel, and PVC pipe and tubing, and every time I set down one of my rough stacks, I lose it. Red should stand out