There are loads of books available at the library or you can Google the subject and get all the information you need.
I've owned two Sibes over the last 20 years (one after the other).
The biggest drawbacks are the shedding, digging, and destruction if they are bored. My dog is 6 and will still dig a hole to China if there's a critter under the ground. Also, you need a fenced yard, as they are escape artists and will run forever until they feel the need to come home.
The upside is that they are extremely intelligent (but willful), loving (to the point of dependency), and social. Try to find a purebred, so you can expect these traits. Sibes are so social that you will practically break it's heart if you leave it alone all day. I agree that if you both work, you'll need a second dog (doesn't have to be a Sibe) to be with it in the yard while you're gone.
Sibes shed twice a year and it seems like it will never end. You need to get an undercoat "rake" and rake it every day during shed. Shed usually starts at the back legs/hindquarters.
Sibes are SO smart. I think they are the smartest dogs, but don't get the credit because they are willful and only do what they want. If they WANT to do what you tell them, they will. If they DON'T want to do what you tell them, they just won't.
They are the friendliest dogs around (purebreds). As a rule, they're not aggressive and won't bite people. If another dog challenges them, though, they will stand their ground and hold their own quite well. Then they'll go back to being little sweet babies and you'd swear it was a Jeckyll and Hyde thing! My dog goes the the dog park and NEVER has a problem with the other dogs. She is always submissive and makes friends with them ALL.
Of course they are also beautiful and have that built-in smile. People will stop you on walks and children will be attracted as well. Teach them to kiss you on the chin, as they love it. They will jump on people to get to their face to kiss them, so teach your dog that's not acceptable. They may still do it anyway. My dog has the habit of "goosing" people (HARD) from the front and back to get their attention. Yours may show other quirky traits.
While they are great with children, you have to be careful with toddlers (1-2 yrs old) who are just crawling/walking because they will knock them down or paw them without thinking and the child can get hurt/scratched. They don't know they're hurting them, they treat them like a puppy. This might be a concern to a young newlywed who might be thinking of starting a family soon. Close supervision of the child and dog should suffice.
You picked a great breed. As long as you know what you're getting into, you'll be fine. If you can find a dog park nearby, visit it often until you find a Sibe and watch it. Also, you can visit some breeders before you're ready to buy and check them out. Be careful, though, because you'll want to take every Sibe you meet home!
Good Luck!
Walt

