linm

I'm thinking of getting a hitch for my 03WRX (some info I've already found) and I have these questions:

1) will the same hitch work for a 06Impreza I?
2) is this a real problem with the Subaru OEM hitches?
3) which is better? the OEM, Draw-tite , or Uhaul?. Any difference in that the Uhaul uses a round-circular tubing instead of a rectangular tubing?
4) if anyone has the draw-tite or Uhaul one, does the hitch go above or below the muffler? I notice the Subaru one has a bend to go over the muffler while the others are a straight beam.
5) is there a plug for the electrical module for both the 03WRX and the 06Impreza I or do I need to splice wires?

Thanks.