Like black, they need a lot of work to keep them looking good. There was a red import around here for several years and the paint looked really dull, reminded me of a 10 year old car that you'd see in Arizona. Having said that I've seen a few good ones. Rosso Red is a much more vibrant red but these are very rare.
Pete
When looked after red is stunning, as you say with black needs looking after though...loved my red VX and love the red Celica. A very good wax is worth investing in.