Welcome aboard, I'll give you my take on the questions.
Read more if you can't make up your mind. I like Cresteds better because to me they are better looking and more interesting. A simple answer but that, depth of knowledge and availability help swing me as well.
Do not buy any pet with the intent to breed right off the bat. Believe me you might end up doing it, but unless your already breeding animals don't start off breeding. Buy one, you'll end up with a couple and later when you want a lot more work and you know what it will entail go for it.
It sounds like your plan to to research and buy in the spring is good. If there are any shows in your area check them out. Also once you get to the point that you know where your going to start you can start acquiring the gear and have everything set up for when you get your first gecko.