MAC or Flowmasters?? Please give opinions.

[JRowlette]

I am getting ready to purchase a new H or X pipe and exhaust system. I am torn between the MAC Flowpath and Flowmaster 2-chamber. Any opinions welcome. Also, would the car make more power with an off-road H and equal length shorty, or with an off-road X and keeping the stock headers? I am having a hard time with this decision because I am spending a whole week's paycheck and don't want to be unhappy.
I really like the sound of an X-pipe, but would like to replace the entire system at once. The previous owner of my car cut out the stock h-pipe and welded in two straight pipes(no "H") back to some cheapass mufflers.
Please help.