For that much money, pick a project you like and knock yourself out. You can pretty much buy everything in my sig line for that much and I have several projects brewing. You are asking a VERY generic question so you will get a ton of different answers.

I would not spend your 6K on 2 snakes. If you really must have one of the 3K ones, I would get it then invest the rest in a few to breed with it as well as top notch housing.