I have been using the Valley View props on my DLE 55. 2 blade 23X8 and 22X10. They seem to need very little balancing as they come from the package. They seem to be just fine for my style of flying and I can't really tell any noticeable difference in the air from the XOAR. I don't do the down low 3d stuff that might be more critical of prop design and maximum thrust, so take it with a small grain of salt. Plus they will drill the mounting hole out in it for free if you want. I haven't tried the 3 blade or WWII style props.