The edge is not really a 1/4 scale plane. Like the gp patty wagstaff it is really closer to a 27 than a 25%. If you want any chance at real 3d you would need big glow (moki 2.1) or small gas, bme 50, zdz 40.
To minimize costs and stay with a 120-160 size
Look at the lanier 1/4 scale edge.
or the 72" katana from gsp or creek hobbies.
Consider the 60 size extra from extremeflightrc.com
good luck on whatever you purchase