Great choice on getting an Aby!
As an Aby breeder I would say take both if: 1. you can afford it, 2. you have no other cats involved. Abys are wonderful cats and owning two does make a huge difference. You will neuter them both I hope to avoid dominance fights.
A little warning - Abys love to be vertically challenged (in other words, they love high places) - if you are the kind to keep fragile things in the open, don't.
If your cat(s) go missing, look up, not down to find them!
Good luck and I can guarantee that buying an Aby or 2 will be a decision you'll never regret!