Land Pride
Woods
Bush Hog
Rhino
Buhler/Farm King
all seem to be decent brands
https://www.landpride.com/product-search
https://woodsequipment.com/products/
https://bushhog.com/#
https://www.rhinoag.com/products/
http://www.farm-king.com/
I have block heater, but my previous tractor did not. My McGyver solution was to use a hair dryer. It worked great. i had also thought about getting a stick on silicone heater to put under the transmission to pre-heat the hydraulic fluid.