I got Swanstone walls for my tub/shower combo and I love the material (kit ordered through Lowes with 15% "moving coupon" discount anyone can request). I wanted something that would stay clean and never have icky grout. My color Prairie is speckled and matte a bit like stone and does not look like cheap plastic. See this link for the color Glacier, the white in the Prairie Collection made from recycled materials. From the site's contact link I requested a color sample and they sent it right away.
Below is the link to the Swanstone kits page. I ordered mine from Lowes and they can help you pick which one is right if you bring in your measurements. The Swanstone built in tall shower niche I got has the soap dish built in and has worked out great. I also learned in the thread about dispenser units for liquid soap/shampoo/conditioner and now I don't need any bottles in the tub/shower.

Swanstone new recycled content colors

http://www.theswancorp.com/index.php?page=green_page

Here is a link that might be useful: Options for tub/shower wall kits

Here is a link that might be useful: Swanstone shower options

Thanks Sue. I'll look at Lowe's tomorrow while I'm out. I would love to use the tile, but I would rather not have icky grout. My former house had white tile with white grout, but I also had a cleaning service that assigned one woman to do nothing but clean shower walls and doors. Unfortunately, I do not have that luxury where I live now.