Despite the fact that we're purchasing everything used for the baby, a glider/rocker is one of the most expensive items on our list! I've done a bit of reading and I think we'd like a glider (I've read that babies like the motion better and our floors are hardwood in a mid-century house which I think would loudly creak under the weight of a rocker).
Aesthetically speaking, the really nice modern gliders we like are out of our price range and I really don't see them being long-term pieces of furniture in our home. We don't like the looks of dutalier/shermag gliders, and I don't think they're nearly as comfortable, and we definitely wouldn't use them outside of the nursery.
When we spend money on furniture, we're really trying to invest in long-term pieces. I don't think a glider will get much use beyond a year.
So, for all you breastfeeding moms out there, what worked for you: glider? rocker? comfy chair? other?