OK-
Now that I've got the ol' firing order figured out

it's time to start thinking about replacing exhaust parts. I read through a lot of the archived posts, but there seems to be mixed sentiment toward some things.
First, do exhaust mods hurt an otherwise stock motor? I have other mods planned but would like to put new plumbing on because it's pretty easy and gives me that sound I'm looking for.
Second, if I have to do one part (cat-back, h-pipe, headers) at a time, in what order should I replace? I recall Mr. 5.0 saying back to front but have seen conflicting opinions as well.
Third, are Motorsport unequal-length headers a pretty good compromise between performance and ease of maintenance?
Last, is getting the h-pipe off really as much of a b***h as everyone says?
Many thanks all...
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Greg
91 LX Convertible