A few things to consider before you choose the right water feature. Size, space, and if you would like to have a formal water garden or informal and how much maintenance you are willing to put into your water feature.
Size will be determined by how much space you have available to build your feature.
If you like clean lines then a more formal looking garden would suite you best, but if you like more natural looking spaces than a more informal water garden would be best.
Fish and plants can be a great addition to your pond, but do you want to maintain them? If no then you may want to go with a sterol water feature should be the best way to go.