I'd get the best you can afford, myself. Otherwise you might spend more time posting about problems than you do hatching!
If I was going to point you toward a be-all, end-all machine, I'd say the Dickey. I have not used one but the guy who builds them is alive to offer support and troubleshooting and I have heard it recommended by many different people from different walks of life and different birds. If I hadn't gotten a great deal on my Humidaires, it was my new incubator of choice. The Humidaires were recommended to me as being especially good for waterfowl too though, so that is what I went with. No point in buying the best stock I could and then buying my incubators on the cheap, I figured.