I run an emp400 emp280 xp1 and xp2 on a 60, so no I don't think it's too much. I'm turning that tank about 13-15 times an hour. Tank houses several loricariids, tetras and a large angelfish. I use spray bars for the canisters firing directly at the back wall of the tank so as to not create a whirlpool in the tank. As long as your current in the tank doesnt overwhelm your fish, you are perfectly fine with that setup. Those emperors are probably a bit closer to 300 gph with media, pads and intake hose, do you should be good