Personally, I always order online to get cheaper deals on Swimwear.
Bigger brands *usually* offer better prices simply because they can afford to slash prices, whereas independent swimwear brands my struggle.
So I'd recommend checking out a large retailer like ASOS:
http://www.asos.com/Women/Sale/Swimwear-Loungewear/Cat/pgecategory.aspx?cid=5263
As you can probably tell, even though the prices are reasonable - the designs are still pretty varied and hot!