Wow that is a tough one and there is no right answer and all areas and rotations are different. If your crops are doing well then I would say hold off on going to a disk drill. If you have a hoe drill and neighbors have disk drills then I would suggest working together and maybe trading some acres to use the drills on each others property so you can see how it works on your land and your rotations to see if the disk drill would actually work better for you than your hoe drill.

We started with a disk drill and it worked good for us over conventional and the minimum till rotations we had done. We are now on our second hoe drill after the disk drill and they have taken us beyond what the disk drill would do for us. Not all areas are the same but don't think that the disk drill will automatically be a better system for you. Try working with your neighbors before committing to a different system.