Yes,
Exactly! She sounds pretty cool. I keep thinking back to when I thought 6 feet was a huge size. I find 8 feet to be a very handleable and impressive size. For a boa constrictor 8 feet is huge, it really is because of the thickness. A female BCC/BCI (BC or BI) at 8 feet is very impressive.
The addition of a semi arboreal snake will compliment the beautiful but terrestrial STP you have.
Variety is fun.
This is entertaining, and I'll bet your girl would actually like a boa.