To the OP, for my last boa I was also looking for light/bright colors but on a budget. I ended up looking for and acquiring a nice clean jungle, she is possible het for some stuff but I'm not breeding her I just wanted her for her and a good clean jungle will have nice popping collars a cool pattern and just gets prettier with age (in my opinion).
One thing I would like to add for your edification and also to solicit some advice from everyone else is that ours are very slow growers, especially if you feed them properly with their health as a priority. That, for me, is a bit of a negative. I love my boas to death but it drives me crazy to think of how long I'm going to have to wait before they have some real size and that is why the large pythons appeal to me so much. My understanding (and pleasecorrect me if I'm wrong on this or any other point) is that retics grow more quickly than burms, but burms grow very quickly compared to boas.