The 28mm lens is reasonably odd. It's a bit wider than 35mm and longer than 24mm. If you choose the 28mm focal length, you're bound to not go for the longer or shorter options just named. You'll get the best of both worlds somehow, but it will be a master of none.
While some photographers these days may just use a Polarizing Filter for the color benefits, there are other uses. Surely, many of us have struggled with the problem of glare on our photos for countless times.
To add a bit of extra sparkle to your photographic hobby, consider channelling your inner 20,000 Leagues Under the Sea and picking up this Underwater 8x10 camera system off of eBay. Yes, that's right--you'd be shooting 8x10 film sheets under water.