Saw a Topcon PCS-100 advertised in the local farm paper for $1875 and thats the model with the GPS built in. How does it compare to the EZ Guide 500? I am mostly using it for spraying, some seeding and will play around with it for tillage. I know it doesnt have EZ steer, but you can hook it into a trimble system if that is needed. Will the accuracy be the same as a EZ g500? Anyone run one of these topcons, how do you like it?