Did you call your insurance company and see which pump is covered/has the best coverage? Start with that. The Medela brand was covered by my insurance and you can order it on their website and you just have to have your insurance card and a prescription from your dr after 28 weeks. You may just have to pay for any extra things you decide to get. I had to pay $75 for mine because only the pump itself was 100% covered and I got the one that comes in a bag and has 4 bottles to pump straight into and a little cooler plus ice pack to keep it cool, plus shipping.
edgepark.com all you do is type in your insurance and it'll give you a whole list of pumps covered. All you do is choose your pump and then THEY contact your insurance company and doctors office as everything for you. It's so easy!