Materials. Look for bathroom basins made from quality materials. You don't want anything that will be easily damaged. Scratches can make it look old and dingy so get something that is highly resistant to scratching. This will keep it looking like new for years to come and you will appreciate the way it prolongs the value of your investment.
The price for bathroom basins will vary based on brand the type of product and the materials they are made from. Comparison shop to get a great overall deal. Don't cut corners though on the quality and end up with a product you have to replace again soon down the road. However don't pay a price beyond what you must in order to get something that is well made.
Showerbaths are a great practical way of optimizing the space so that you have the comfort of both bathing and showering. Walk-in showers are also very popular in the modern bathroom and if buying a shower enclosure for the modern bathroom choose one with a chrome structure over white.