Super Pastels darken quite a bit as they age... I dont have enough experience to determine which, if any will maintain good coloration years down the line, but I generally see them darken.
The key would be to mix them with another morph that acts as a highlighter with Pastels. I know Fires tend to do that well and Bryce at the Reptile Image just hatched out a Super Pastel Fire (will try and have him send me a photo)...
Here is a few week old photo of a Super Pastel Special which incredibly gets brighter with age...
I just went to take photos of a 2 year old and a much older adult Super Pastel when I realized my batteries are dead! I will post some tonight!
That one is gorgeous! Yes, please post your other snakes.
I know is didn't start this thread but it's an interesting topic to me too.