prat, right.
Duff, neos are great to work with. I think you'll really like to do breeding with a goal. It's not for everyone since there's a lot of blood, sweat, tears and space involved- or what I call the holy trinity space/time/money- but when you reach a goal, there's a lot of pride that goes with it. You can sit back and say, "I did that!" You even get to name your own strain.
For the record, no common neos I know are able to be kept together since crossbreeding will happen.
I think the first thing you need to ask yourself is does it matter if a "type" has already been developed?
Lots of people curious about breeding for a goal try to breed cherry to fire red/pfr status. It's a nice project that doesn't cost much to start, plus I think that is one reason why fire red strains are pretty hardy nowadays. So many fire red strains have been developed and crossbred, the genetics are still diverse while keeping the modifiers in line.Or is it important to you to work on something new?
Why not attempt to create a consistent racing stripe on another color? Striped chocolates or striped reds for instance? In other places in the world, stripes are a separate strain, and have become quite popular. Sometimes stripes are not just one color, either. So you can even choose a particular stripe color if you find one, and even change that later on if another color consistently pops out. To me, this holds the most promise. For instance I have seen fire reds with white stripes, orange stripes, and even some with pink stripes.
Regardless what you choose, feel free to start a journal so others are able to learn from your successes and challenges. I know I'd love to follow along to see what you come up with.