I am not a fan of loader mounted plows in general-but my experience is with smaller tractors where the steering is seriously affected by them since they stick out so far. I have a few recommendations, but first can you tell us how much plowing there is and what type of surface you have to plow?
I have a 4520 and I have a 84" snow push on the front of mine. Its very heavy, but the tractor has no issue with it. I can turn no problem unless I get it loaded full of very wet snow. I run 440 pounds of wheel weights and I do not use a balast box in the winter.
If I had it over again, I would buy a 72" snow push, but I got a helk of a deal on the 84.