There are more expensive brands but really, as I said earlier in this thread, there is a big enough difference in color between 10ppm and 40ppm and you don't really have to worry about nitrates under 40ppm. And for short term, even higher than 40ppm isn't a problem. As long as you are doing weekly 25% to 50% PWC's, filter maintenance and gravel vacuuming (with the percentage of PWC dependent on the difference between your tank parameters and your tap water baseline parameters and your bioload), you shouldn't have a problem. And if you have live plants, they will keep your nitrates at lower levels anyhow but you still need to do PWC's to remove other pollutants in the water and add some fresh water and nutrients into the tank.
On a side note, since Riverfishgirl scored a perfect score on the FM100 Hue Test, I hereby nominate her as the official AquariaCentral.com API test result reader!
Does anybody 2nd the motion?
LOL