Orajet is a decent media - Theres also two types of Calandered... Monomeric and Polymeric. Polymeric is better than mono, as it doesn't shrink as much.
I believe most orajet is Polymeric... but I may be wrong, I know the Calandered we use from them is. The cheap stuff you can get for $100 a roll is usually always Monomeric... That stuff curls on us no matter how long we let it offgas. Heck... by the time we get to the end of the roll, you can see how much it's shrinked and see like a quarter inch of backing paper on it. That stuff would probably curl even without it being printed on.
Eco-solvent has a lot of alcohol in it... the alcohol evaporates, and the vinyl gets stiffer which causes it to curl (If it's been cut). Latex heats it up so much, cutting it will also cause it to curl right away... I had a cheap $100 roll of monomeric, and by the time it was out of my latex machine it was rolling itself back up pretty tight. First and last time I used monomeric cheap material.
Stick to good brands like Avery, Orajet, 3M, Hexis, and you should be fine with curling no matter the printer type, so long as you let it off gas - Buy cheap no name brands, and you'll likely run into problems.
We use an Eco solvent... I just cut 1000 decals, non laminated about an hour after they were printed. No curling or nothing... but I used a Cast material. There are lots of things that come into play when it comes to curling... If you use cheap material, you need a white bleed around it.