We run all green tractors but have been around Agleader systems as well. Close family has been running Agleader and tried WAAS but was very inconsistent. Fought WAAS through NH3 and the start of planting. Finally went RTK off of the CORS network and having success. They have started to switch out to GS3 systems.

My family has been using ATU 200 with 3000 receivers and 2600 and 2630 display's. We only use SF1 and get along very well. We have 2 systems and move through the combine and different tractors depending on season. Planters have row clutches and autosteer and as long as you drop a marker before filling to shift the line, there is very little/any drift in half mile rows. All units plug and play and are easy to use. I'd look for 3000 receiver, 2600 monitor so you have more functions down the road, and either a ATU 200 or 300. Should be $6-7K but have a very good base to build off of for down the road.