Welcome to Rollitup
I had this very debate with myself several months back, while it was more expensive on the short term, i settled on ebb and flow for several reasons;
-by not having the roots submerged 24/7 they will be healthier and less prone to rot.
-Its much more convienient to have a reservoir seperate from your plants when changing water/cleaning it.
-the experts generally agree that active hydro will out-yield passive hydro, and my growing hero Al B Fuct grows ebb and flow.
-its much easier to do a perpetual harvest sea of green (in my opinion) with flood tables
I'm definitely happy with my choice and would reccomend it to anyone.
I take plants straight from my aerocloner into the tables under 1000w hps @ 12/12
They flood 3 times per lights on for 12 minutes and go unwatered when the lights are off.
Its only my first run, but even with the tiny, unhealthy clones i cut i should yield between 10-25 grams per plant.
I can't say enough good things about ebb and flow.
As i said, im still pretty green to hydro, but if i can help you in any way feel free to ask.