Although I tend to avoid products with the name 'Euro' in it, the Euroreef gets my kudos because it uses a needle wheel to get around the venturi/bubble problem. In this respects it's light-years ahead of the Seaclone and other simple powerhead based skimmers that I wouldn't pay a dime for.
A friend of mine has a Euroreef, or some other similiar needle wheele type skimmer and praises it highly. He rated it's performance on par with a Remora while in-sump and claimed both worked about the same efficiency. The otherwise 'tanks size' rating of these devices is pretty much a marketing thing since either the Remora or EuroReef would handle a 90gal or much larger provided they are in sump or in line. Tank capacity when used as a hang on back (HOB
) skimmer is otherwise a function of which one can push the most water in that less efficient mode. When used on a 90gal and *not* in a sump I'd lean towards the EuroReef becasue of it's greater waterflow even though I'm a dedicated Remora user.