I've just bought one and I went for a Brinsea on the basis of the recommendations I read everywhere I researched (including here). I don't work but I'm not organised enough to remember to turn so I went for one that automatically turns and controls the humidity. I also want it initially for goose eggs so that limited my choice to one of their bigger models. If you look on their website, they have some tables which compare all their models, what they do automatically, capacity etc. which I found very helpful. Then google around for the best price you can on the model you've chosen - the Brinsea direct prices were not the best for mine. Amazon seemed to have a good price on some of the smaller models but didn't stock the one I wanted.
H