Hi!
I used to be a Robatsch (modern defence) player in my earlier days. But a some time ago I've switched to Dutch - Leningrad variation. I have some good results with it, but for some reason this opening not suited me perfectly. Maybe it is only a temporarily, but I've started to think about Benko/Volga gambit.   
So my question is about a comparison of  this two defenses. Does Benko or does Dutch Leningrad gives better practical chances to fight for a win in must win situation? What is a current theory judgment about critical lines in those two openings? I have to admit I'm 2000 rated player right now and choosing a right opening now is very important to me.
Thanks in advance.