Auto steer systems in a windrower

I have a deere r450 and looking into different auto steer options. I would prefer deere, as I already have monitors and recievers I could use. But looking at the deere and the huge motor that's pointed right at your nuts would be a nightmare. There will be lots of times I will have to steer, and we dont have flat smooth ground, I would be smashing my nuts in that stupid motor every bump. Just wanting advice on what option is best...deere, trimble, agleader etc. Thanks

Auto steer systems in a windrower