A one bedroom will work, especially given your experience with small spaces. :) Don't forget you will have the rest of the apartment to stow things in as well, so it matters not just how big the one bedroom is, but the rest of the apartment as well. Of course, you're going to have to watch how much stuff you accumulate :), but I found a kid doesn't really take up much room until about age 2 or 3 if I remember correctly.
As for no baby in the bed -- I disagree. I breastfed both my boys and having them sleep with me was great! I never had to get up at night. EVER. Baby was hungry, I rolled over and baby suckled. It was soooo easy. I kicked both of them out when they didn't need to eat during the night anymore, unless hubby was out of town. One boy would still sometimes sleep with either me or my husband if one of us was away until he was about, oh, 8 or so. The other one flat out refused to even nap with me by the time he was 3.
Good luck in the apartment hunt!