I've lost one too many shots with my EX1r as a result of not being able to see clearly enough through the evf to follow fast action and keep focus. I need to get something better for difficult focus situations. Thinking maybe the Zacuto. Comments, advice, suggestions???

One guy I know uses or used, not sure if he still has the EX1R, an Alphatron. He swore by it. I was thinking about one for my JVC HM700.
http://www.bhphotovideo.com/c/search?Ntt=alphatron&N=0&InitialSearch=yes&sts=ma&Top+Nav-Search=