I don't have any personal experience with the three options you listed, although I would be leery as I don't think any of them are a high enough quality to EBF while working full time... I would worry about supply. Before you go drop the big money on the PIS, though, I highly recommend looking into the Ameda Purely Yours. The quality is comparable to the PIS, but mine was a hundred dollars less. The lactaction consultant I spoke with said I needed either the PIS or the Purely Yours if I was going to be away from my baby all day. I work full time and love the Purely Yours, I definitely recommend it!