I've always loved the menacing sound of sustained, bowed pedal notes and am considering getting an upright bass with a $1500-2500 budget. To give me more low end, I would want it tuned BEAD (like the top four strings of a five string bass guitar). I know there is no stock upright tuned like this, so I would want one that could be somewhat easily modded for this tuning. With the proper strings, would a 1/4 or 1/2 bass be large enough, or would it be wiser to get a 3/4 or 4/4? Are there any specific models that might be better suited for this setup?