I would stay away from the 750 and Field IQ. The 750 is very limited with it's capabilities, not to mention functionality (the cancel button right next to the accept button). As far as field IQ goes Trimble has a long way to go. We used to run all trimble on planters and sprayers, so I have spent a lot of time with their field IQ. There problems range, the most common one is that the field IQ will be lost. Sometimes a simple turning off and on will fix, next time you may have to completely recalibrate system, this last planting season I had to recalibrate 5 times in a row on my planter before it worked. On our sprayers we never could get it to run right. If you are simply looking to run a sprayer I am a big fan of the Raven systems. From my experience if you are just looking to steer Trimble is fine, but their implement control is absolutely horrible.(After three years of fighting we now run JD planters with 2630's and Ravens in our sprayers.)