I've been happy with my Hovabator with circulating fan & automatic egg turner. I've also added the digital hygrometer, but I keep the mercury thermometer in there with it to make sure the temp is calibrated right (and so far it has been). I had humidity issues with my first hatch, but I didn't have the hygrometer AND I kept opening the lid during the hatch (big, big mistake--don't do it!!). Now I've just got the central reservoir filled and my humidity is staying nicely around 60%. The hygrometer lets me know easily how I'm doing without opening the lid to check the water level in the reservoir. And I'm pleased with the fact that following the incubator's instructions gives good results on humidity.
Anyway, there are more expensive incubators out there, and cheaper ones, and I certainly someday wouldn't mind having one with a digital proportional thermostat (the cheap wafer thermostats in the lower-end incubators tend to fluctuate a bit, and they have to be adjusted as the incubation nears the end and hatching begins), but for now this one works just fine and it wasn't horribly expensive.
In the end, as long as it's basically functional, your first incubator is just your first incubator. Like any hobby, you won't know what you TRULY love until you've had some experience. So go with what makes sense (and isn't too costly) for now, give it a whirl, and later if you want another incubator (and who doesn't want another incubator??), you can buy whatever makes sense to you based on your experience.
How's that for a definitive answer? lol