First thing I can say is after you get a BC whether it be BCI or BCC is you will find out how easy they are to handle. They are actually the PERFECT snake for many reasons. Size can be impressive yet not giant. They are almost always easy to handle unless wild caught.
I have a 6 foot male locality BCI that I still handle with ONE hand. 6 feet is rather small all wrapped up. An 8 foot female of almost any species is a good sized boa.
As mentioned, THE COMPLETE BOA CONSTRICTOR is a must.
IMO there is no royal python that comes close. Activity and semi arboreal traits go to boas. They are possibly the most consistent feeding snake out there.
Research and prepare well.
My personal opinion is to go with a locality, whether it be BCI or BCC. Pure "Mother Nature" coloring and selectively bred boas are hard to beat.
This is a true locality BCI that was almost dubbed BCC by the breeder.
Barranquilla, Colombian Boa. Bred by the master Gus Rentfro or Rio Bravo Reptiles. He closed his doors, but Legacy Reptiles has taken over the stock.
Look at him here.
My 5' 3" wife could easily handle this animal. He will maybe hit 7' in his lifetime and still be an easy keep.