Grey Ghost is on my list, too. I like the softer look of its green-white combo. They are sun tolerant, too, although better with a little afternoon shade.
I want some for me and some for my mom, could do as many as 10 colossal. Nice price break if we get to 25... $34 for 10 colossal, $75 for 25 colossal. Hope more folks will be in for doing the colossal ones? (Regular size is $12 for 10, $26 for 25... and I'm willing to bet that 1 colossal bulb will have more impact than 3 regular ones.)
Here's the page of "colossal" bulbs:
http://www.caladiumbulbs4less....