I would prefer an independent body do that.  I have yet to find one that I thought was truly 'bi-partisan' and none that didn't look out only for the two major parties, however.  

Having unelected Federal Judges who serve for life make the determination is about the worst way to 'represent' the voters, in my judgement.  All of them were political appointees and any subject matter expertise they possess on any subject is accidental.

A Federal Judge is just an attorney a couple of Senators from that District's State  liked or selected because they owed a political favor to someone.