Any of them really. 

2600 is next oldest and I'm not a huge fan but if all you need is steering it's ok. 

2630 is next newer one and nicer than 2600. 

4240 is cheaper Gen 4 and newer yet, 4640 is full size one and more $$

G5 universal and G5 plus would be newest/current displays. 

All would work with that setup. If you also move monitor to combine, sprayer, or other machine is where I'd decide which one to get. Some or all of those can control sprayers, planters, run combine yield maps and corn head row sense and more. Implement guidance etc