I tend to plan waaay in advance for pets (notable exception being Frank-the-frilled-impulse-buy) and I have a few questions about boas that I hope someone will be able to answer for me. I want to decide ahead of time what I'm looking for and how much I need to be saving up. If you could answer any or all of the below questions, I'd really appreciate it!

1. I know males tend to be shorter (which is a plus for me), but do they tend to be overly slender? I want something with a bit of heft, but not too much.
2. Do Kahl albinos generally always turn out that nice pale yellow color?
3. How much would a Kahl albino male BCI generally run? What about an Arabesque BCI? I've tried looking on Fauna and Kingsnake, but there are so many combos out there, it's hard to get a price-point nailed down.
4. Any cage recommendations for an adult BCI? I don't plan on breeding, my boa will very much be a pet/display snake, so I want something that looks nice and is easy to clean.
5. Are Argentine boas similar in temperament to BCIs? I love the dark speckled look, but it's not worth it to me if they are a temperamental subspecies.
6. Do any localities or subspecies of Boa constrictor tend to have a nicer temperament than others?

Any other recommendations, keeping temperament and my color preferences (lots of speckles!) in mind?

Again, I really appreciate any help. I've done a lot of poking around for information, but these are the things I'm having trouble nailing down.