Aquaclears ! I have 2 Emp. 400's in the garage unused. Ran them for a few months and they did fine. Just went back to my old stand by Aquaclears.
I run 4 AQ 70's, and 2 Rena XP2's on my 125g.
More media options with the AQ's, and better surface agitation than the 2 Emps.
Just my $.02
To each his own.