Which suit do you want to wear for swimming? Probably not a bikini or trunks. But then what? For girls, you probably want to wear a one piece. There are so many colors and pattern to choose from. At the moment, my suit is bright orange and red and yellow swirls TYR. Last year i had a plain dark blue speedo suit. A lot of my friends like Nike suits though. There is no “best” suit. You just have to pick the one that works best for you.

I like bright paterns like this, but many people have solids like this:

I’m not sure if these pictures will show up, but if you want to see some more, one of my favorite sites for shopping for suits is www.swimoutlet.com You should definitely go there for reduced prices on expensive suits if you need a new one.
Different suits are good for different things. Not all one pieces are ideal for swimming. For example, water polo suits are extremely tight. They are made so as not to be ripped or pulled off by opposing teams. But it would be hard to breathe during swimming if you were so restricted by the tightness of the suit. Before you buy a suit online (without trying it on) you should do some research on what it is made for and what it is NOT made for. Be careful; if you have specific size requirements, it is probably a better idea to go to the store and try them on before you buy.
I hope you found this useful. Please comment to tell me about different suits you want me to review or good sites. Thanks!