I have an LG still air (only thing they had at
Tractor Supply) with egg turner, and a Hova Bator forced air (has a fan) also with egg turner. I'm a total newbie, having only had 1 hatch in my Hova Bator that went bad because I moved the whole shebang 30 miles on day 21. I now have over 50 eggs incubating, divided between the 2 and I can tell you this much: the LG does not hold it's temp, is hard to adjust and requires you to put something on top to hold the top down securely or add weatherstripping or some other insulation around the edges where the top meets the bottom. In my opinion, the thing should come ready to use, not needing us to fiddle around and jury rig it. Lots of chicken folks are "fiddlers" and love to fix stuff, improve on designs, etc. But I'm not one of those types. I expect to buy a machine and have it run properly, actually function reliably and consistently from hour to hour, day to day. Those chicks need some degree of stability in order to grow properly. I can tell you I've had many quitters from that bunch in the LG, probably due to huge temp swings even though I was not opening it. And I have 3 thermometers in there, including a water wiggler!
So, you might want cheap, but avoid the LG, esp if you are new to this and are not a fix 'er upper. For styrofoam, Hova Bator seems okay, but I think the programmed temp models like
Brinsea, with auto turner would be my choice. Like someone else mentioned, the
Brinsea website has a nice sale on for the Eco model, and the autoturning cradle is also on sale, $20 off-- (unlike egg turners for LG and Hova Bator, the
Brinsea egg turner actually is a "cradle" the whole incubator sits in and rocks it from side to side). I have spent much of the past few weeks waiting for this batch to hatch researching incubators and realizing I wasted about $100 on that darn LG, when I could have a very nice
Brinsea for about $150 including the autoturning cradle. That's not including the lost chicks from eggs that quit!
Have fun! Keep in mind how much you plan on incubating eggs, how much you want to fiddle with them once you start, and what sort of investment aligns with your goals.