If you're going to use toe cages (as I did for many years - only went clipless a short while ago), definitely go with the straps as well - I tried once without straps and found my feet sliding out the sides of the cage on a regular basis. Plus, ironically, I found it harder to get my feet back in when on the move, as the cage tended to close up back on to itself whereas with straps, it held the cage open.
I'll admit I never tightened my straps up all that much - never had any problem freeing up my feet when stopping, just pulled it out. The cage was really only there to help me keep my foot in the correct position on the pedal itself.