Hmm well I use the Resun Waver 2000 and it has been great. Gives out a nice flow of water for my anemones.
A wavemaker is a must in my opinion cause for one it gives the corals good oxygen flow, the fish love it cause they feel more like in their natural environment, and it keeps the water flowing through the tank so very little dirt settles without been filtered.
The Vortec wavemakers are the best cause they have got somany neat features and not to mention they just look cool cause they are wireless but they can be quite expensive.