I have decided to get the hova-bator 1588 with the egg turner #1611 & it is a circulated air. Many people recommended it & I looked at a lot of them online & chose this one too. They run approx. $125 & the turner about $45. Check out different website for best prices. I think the measurements were approx. 18x18x9...something close to that.
I agree, the Genesis 1588. I haven't gotten 100% hatches like some say they have, but it is excellent for holding themperature and mine has an automatic egg turner too. Home and Barn Basics is where I got mine and I am thrilled with it!