I finally bought a dehumidifier for the basement. I paid $320 including shipping for this
Winix dehumidifier. I started looking for dehumidiers over a year ago but couldn't find anything that seemed worth buying. The reviews were really bad for most dehumidifiers. I got the impression that often they don't last much more than 2 or 3 years so I couldn't justify paying a lot of money for one. Finally I saw that Winix dehumidifiers got really good reviews by buyers online, something quite unusual for dehumidifiers.
My unit arrived 3 days ago. This unit is almost filling up its bucket twice a day. I estimate it is removing about 3 gallons of water a day from our 2100 SF unfinished basement. I will soon hook up a hose in order to gravity drain the water into our one of our basement floor drains so I don't have to empty the bucket twice a day. However, I wanted to use the built in bucket for a few days so I could see how much water it collects.
So far I'm happy with the dehumidifier assuming it keeps working. My wife has expressed that the dehumidifier is making the basement feel colder; she's not thrilled about aspect.