Register for the furniture. Your registry is just a wish list of items for you and your baby. You never know what people will want to buy you and it isn't your job to decide what is too much for someone to give you - know what I mean?
Besides, if you have it on your registry and you don't get it and buy it on your own, you'll get that lovely registry completion coupon to use towards it and save yourself a little money.
This. I put everything on the registry, not expecting people to buy everything, but I want it on there for the completion coupon. I only registered at Target, and it broke down our registry by price range, and I actually had more things around $20 or less, even with the big ticket items on there. And my MIL asked us if she could buy the crib, and because it was on the registry, she was able to see which one I had researched and decided on, instead of her spending money on something we didn't want. Same with the carseat that my birth mom bought and high chair that my mom bought. You never know what people will buy you, and this way they know what you'll want if they do. If they don't buy it for you, no biggie since you were going to buy it anyway, and it will be on the registry for that completion coupon.