While I upload my photos from the weekend of gaming, here are my top three
#3 Hard Boiled (Hospital)
Wonderfully over-the-top Hong Kong action! I think this was my first John Woo movie and is notable for the long take and minimal fancy camera work
#2 Way of the Gun (Free Cheese)
This is an exceptionally underrated (or just unknown) film, with several other brilliantly done shootouts. Well worth your time. Just remember: there's always free cheese in a mousetrap.
#1 Heat (Heist)
It's a Michael Mann film, so we can't be surprised at the cinematography, but hell, this is a full-on long-range shootout with tactical movement. (No embedding allowed on this one, so you'll just have to click through the link above)
Also seriously considered:
Let me know if any of your favourites didn't make my list...