I'm using Spectra S1+ and 9+. Spectra is an affordable brand with good reviews. A lot of moms are raving about it. S1+ retails for $379 on Pupsik Studios online.
Both are rechargeable. S1+ is a hospital grade pump which is more suitable for home or office use whereas 9+ is a light and portable pump best for outings.
Medela is the to-go brand and Medela Freestyle is a very popular model.
You can look at this link for other options as well.
http://sg.theasianparent.com/best-breast-pump-shopping-guide/
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