Change Ugf For Other Filter

[saabsational]

Hi - Newbie - I posted this in the New to Hobby section, but think it should be here .

I have a 48"x15"x12" freshwater tropical set up.

I run 2 UGF powerheads at present, a friend has advised to swap these for a Fluval 4 or an Eheim.

Question is which Eheim would be suitable as an alternative to the Fluval.

Any pros and cons against either?

TIA

Chris