I always just open the footage to the preview monitor... if things start getting a little slow (too many open files) you can click on the tiny "x" in the upper right corner and opt to "close all" sources open in the preview monitor. Works well for me...
Its just for a quick view.
You can change the view in this viewer to a different snaphot if the clip starts e.g. black.
Real viewing is done in the Preview Monitor.
You can also turn on the thumbnails to a fairly big size for the clips in the projec window if you which.