It's a pain to adjust the thing alteast once daily. All it has in it is little foam balls. I don't see much biological filtration, just a bit of mechanical. Plus it is an eyesore to the tank.
I'd do this:
Eheim 2211 $70
Do Aqua Mini outflow $50
Do Aqua Mini inflow $56
I have a Mini M on order, that what I will be running. You could buy a cheap fleabay pair as a backup.