My opinion is Bennett tabs, unless you need TNTs (trolling motor tabs). I have seen too many electric tabs fail... hydraulic is superior IMO. Plus their customer service is unparalleled.
No one can touch them on customer service.
You really should look into the new Volvo Penta tabs. They won a most innovative award at last years new product show. I installed them on my boat and can say it was a breeze, all plug and play with a very nice package and booklet. When using them they work in conjuction with each other, as one goes down the other side goes up, while only using one button. No actuator, pump or large plate to deal with, leaving plenty of room on the back of the boat to mount other stuff. I was able blance out and bury the nose on my 22 with no problem. With the Volvo Penta backing I feel pretty good about the new product. They could make the ones with the accuators obsolete on small and medium size boats. I noticed Beavertail skiffs have gone with them exclusively. 8)