For the ease of access to the seat it is hard to beat 4A (or 3F) on the three-class 777s. 11A and 11K are also fine. The galley and toilets are somewhat nearby but not directly facing 4A (through the curtain). There are ear plugs in your new CW amenities bag. 4F is for crew rest, I think, or at least it is a decidedly crew-rest looking broom closet marked "crew only".

Colorado gets its highest amounts of snow in March so you should be in for a good slide!