I have the same problem with water under my house in the crawl space. I am installing guttering and doing some grading. Make sure that the area around the entrance to your crawl space is not letting in water. If I can not correct the problem in my house with guttering and grading I will install a pump. As for where to pump the water, I intend to tie the pump directly in to my sewage waste line adnd on out to the sewer from there. I don't know if that is an option for you, but it certainly is a good solution if available to you.