Hey there karaokefreak,
First thing: Please read and acknowledge the forum rules before continuing. It's something everyone here does, to ensure that we're on the same page - so to speak.
A decent question. Personally I find CG to be the brightest, most vivid colour in the US line-up, but others find it to be GB. They certainly are the "strongest" colours in the visible light spectrum though, whereas reds, and oranges are "weaker".
I'd say though, after a personal decision on hilt and colour (it really is up to you - your money), that the type of blade will matter most.
Here's an opinion you may value:
http://www.saberforum.com/index.php?topic=3096.0Cheers, and welcome to the forum.