While some of those things look decent and can last, had you considered a real tiled shower? Lots of people do it themselves. Check out www.johnbridge.com Tile Your World website if that is a possibility.
Another thing to consider is that, while not that many people use their tubs as tubs, if this is the only one in the house, it could degrade the value. A family with young children really wants a tub, and some people feel it is essential.