After about a month of using my SGS4 with the case, I'm still really liking it: i-BLASON Transformer Hard Shell Case Holster Combo For Samsung Galaxy S4 i9500 with Kickstand and Locking Belt Swivel Clip
. It might be the cheapest good case with a kickstand, coming in at $7.49 shipped with Prime (or $25 order) on Amazon.
It doesn't add too much heft or bulk to the phone. The holster, which I rarely use, is pretty good and swivels 90 deg. in either direction. The kickstand's only downside is - and it might be due to the long screen - that when viewing in portrait mode, like when reading web pages, it's easy to knock over if you press too firmly. When in landscape mode, it isn't so top-heavy and won't be so easily knocked over.