Att: full-time pumpers!!

[Hope]

After 13 weeks of troubled feeding I am at my wits end. DS became ill at 3 weeks and was diagnosed with breastmilk colitis and after putting it off at seven weeks I eventually had to put him on a special formula for three days to clear up the blood in his stools, during this time I got mastitis, my supply dropped, and Hamish fell in love with the bottle. After building my milk back up and continuing to BF we also realised that Hamish's screaming was not related to his bottom end at all but that he had silent reflux. He also has a preference for one breast over the other, hates my fast let down which chokes him,so I've been using a shield with one hole in it so he can suck it through at his own pace and now he refuses to go without it, etc, etc. I've tried pretty much everything to keep him on the breast but feeding him in public is a complete nightmare and have found he only really relaxes during his morning (breast)feed and on the bottle.
(Anyhow sorry about the rant) I have basically decided I'm going to express all feeds (so I can add thickener and/or Gaviscon, etc) and am after recommendations for electric pumps, as well as any tips on how to make this work for us. I have been looking at the Medela "Swing" and the Ameda "Purely Yours" (?) Does anyone use either of these pumps??
Thanks in advance girlies-- sorry to rave.
xo