At that price, I'll be spending the extra $50 for an X Pipe and custom built system

Balance tubes work far far better than x pipes, most mobs like manta have stopped building systems with xpipes in them now because they both make the system quieter and ruin the note.
custom built is not always better too unless your using top of the line mufflers like magnaflow. most costom built systems are press bent too for less than a grang. there is a lot mor R&D gone into a system like manta or red back or di filippo than something that is custom built