The only props that come pre drilled are the ones with the single hole in the middle of them (all of them) outside of that if you need other holes drilled (4 bolts, 6 bolts) depending on your motor that is up to you to do.

They are not hard to drill yourself if you take your time and drill from both the front and back. Most engines have a drill jug you can buy to assist in this process.

I do not know what the DL needs or if a drill jig is available, but if you take your time it's not that bad at all.

Some good props are, Xoar, Mejzlik, Menz, Vess. It really depends on your flying style. For example a Vess has large amounts if thrust for 3D but is very loud and doesnt work well in IMAC.