The Ovation 28 Advance incubator by Brinsea is a good choice as a mid-level incubator. It features a fully digital display of both temperature and humidity with precise control of temperature. Humidity is controlled by adding water to the chamber and has a level indicator to ensure good humidity range.
Egg capacity with standard egg carriers (included):
IMPORTANT: register all Brinsea products within 30 days to be eligible for their extended warranty.