Hey Stella -
I've run EuroReef.....very nice but can be pricey as sin as the other poster pointed out.
I'm going to be settting up a 125gReef and a 310g.Aggresive soon. I'll be running the AquaC Remora Pro. I'm running it on my 29g now and it's kicking butt.
It's all realtive to how much your have to spend or more, are willing to spend. I've been talking to lots of Local Gurus and they all LOVE the RemoraPro that I'm running. For a 125 I'd reco - least a 350gph pump. Keep that waterexchange high and your tank will love you for it.
Peace