Incubators with a fan keep more constant temperatures and humidity throughout the incubator. So, a fan system is always more disirable.
With a turner all you need to do is double check temperature and humidity daily. Candle a few times during incubation and that is it.
Get a hygrometer to track humidity.
For the money the 1588 is your best buy. If you had a little more to add to the budget I would recommend the Brinsea Ova-Easy. 380 egg capacity and fool proof operation. Mine have proved out to be set and forget systems. After I bought the first, one I sold my Sportsmans and replaced them all with the brinsea Ova Easy 380.
With a turner all you need to do is double check temperature and humidity daily. Candle a few times during incubation and that is it.
Get a hygrometer to track humidity.
For the money the 1588 is your best buy. If you had a little more to add to the budget I would recommend the Brinsea Ova-Easy. 380 egg capacity and fool proof operation. Mine have proved out to be set and forget systems. After I bought the first, one I sold my Sportsmans and replaced them all with the brinsea Ova Easy 380.