Which Filter For A 125 Gallon

[EgoFumPapa]

I'm getting rid of my Fluval FX5 because I cannot stop the dreaded microbubbles. I want to switch over to Eheim, but I am not familiar with them. Which Eheim filter(s) would be more than adequate for a 125 gallon? Thanks!

 

[Aquascaper]

Eheim 2178 (Professionel 3 600T)

 

[phantomlink]

I had a single Eheim 2217 ( Classic 600 ) for my 125, but just got a second one to get my flow rate in the filter around 4.2 times per hour