Pedals for track

Hi, next season will be my first on the track (herne hill) and i'm looking to swith to clipless, **now i have always used clips and straps **so know nothing about spd's. I have read the thread and there does not seem to be a definitive answer as to which are best. Basically what would you guys recommend as having the best and strongest retention? (i don't want to be flying off my pedals)

And eqaully what sort of shoes should i be looking for? one problem is i have size 13 feet, which will probably make finding shoes more difficult.

Thanks in advance

I have to ask, why not just use them then? People have raced bikes with clips and straps for over 80 years without issue.
We all like having new toys, but why not try the track first, before spending £150+ on pedals and shoes?
I am sure you will love it etc, but there are many forumoungers who have built and bought this that and the other in the off season, only to ride the track about 3 times and give up.

Just a thought.