I will have both. Our house is really open plan too so at the moment we have a gate and doors shut that keep DD in the family room/kitchen/dining, and then another gate upstairs that keeps her in the bedrooms and family room. Once my new baby is born I will also have a playpen so that while feeding/changing "Ned" I can put DD down in the playpen so I know she's safe while I have my hands full - even with the gates she can still get herself into a fair bit of mischief!