I left you a PM by mistake, but I'll post here as well...
Personally I like the BHB line, but I have seen some outstanding snakes and some ugly ones from all of the lines. I look for a Cinny that LOOKS like a cinny, and not one where you have to analyze the pattern, head, color, etc. to determine if it is or not. In other words, it shouldn't look like a normal at all. Look for nice dark blacks or dark browns along with the orange or cinnamon colored lighter areas. I like nice faded head stripes and a flamed belly, although that doesn't seem to be a factor when making combos.
Here's a pic of one of mine:

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