I use the Medela Symphony, which is a hospital grade pump and is truly the best pump on the market. I rent it (part covered by insurance) because it retails for $2000US
. I absolutely love it and have seen a dramatic difference in my milk supply. It's actually quite small - I started on a different hospital grade pump and that thing was a beast. This one is about the size of a toaster.
I have low milk supply and started on the Pump In Style (which is excellent if you make good milk). She won't know until she has the baby, what her milk supply is like.
You said money no object!