I have been using the AquaChek Tru-Test Digital water tester for almost a year and really like it. The AquaChek uses strips, but the readings are very accurate when I compare it with my Taylor Test Kit. The readings are in digital form on the tester so I don't have to figure out what shade anything is anymore.
Here is a link for the unit I bought. http://www.rhtubs.com/store/test-kits.htm#but
Here is the manufacturer's link: http://www.aquachek.com/servicepro.asp
It comes with 25 test strips and costs about $60 bucks. I just replaced the original batteries which lasted just under a year. I would definately buy it again.
Rich