The V packer is what you want, a 1" opener and the V packer is the best and what the drill is designed for. The 3/4" is second best but it can be tricky to get good seed placement with it on certain soils and conditions. Theres been a lot of trials and data on this, trust me on the 1" openers and V packers. Field finish isn't going to be smooth, but packing and placement is excellent. Its a trade off. Plan your swathing intentions accordingly - don't want to be more than 20-30 degrees. Depending on soils, no issues with putting phos in seed row, that's where it NEEDS to be anyway. We put 30-40 lbs actual down with cereals and 25-30 down with canola and flax no problems.
QDA is a nice option if you seed a lot of different crops at different times. We usually change from cereals to oilseeds back and forth often because of when we can get on certain types of land, or to split up harvest so its good for us. And we have lots of different types of soils to deal with. An XTC is better if you have hills or contouring land which is same price as QDA. Seeding speed is about 4.5-5 MPH with this unit and banders.