i agree 公立醫院 are not always bad BUT if you can afford, why not going to 私家醫院? I gave birth my 2 kids in Baptist, all the nurses and "Ah sum" are very nice. When I felt tired and don't want to breast-feed my baby in midnight, I could request them to bottle-feed her. I chose a 3-persons room but most of the time, it is not full and I could "charge" myself in a quiet environement.
Also, I believe if you chose 公立醫院, the doctor you visit is different everytime. I prefer to have ONE doctor who takes care of me starting from the beginning to the moment I deliver the baby.
Regarding 補身, I did not spend extra money on 補身. I just ate Ginger fried rice, Ginger pig legs and Chicken wine. They are all very good and not expensive. Another very important thing is to do exercise before and after delivery baby.