what your car is going to sound like is really based on the car. i took my resonater out and replaced it with 2.5" piping custom. it sounds great. not much different than it did with the original piping...just louder.
the resonater basically takes out the lower pitched sounds (the rumbles) while the muffler would normally take out the higher. in this case your muffler accents the highs probably more than the lows, which would be good..if you want your car to shatter glass. but i liked the lows too.
but. a word to the wise would say to get a muzzle for the muffler to if you are going to take out the resonater. because those nights coming home at 3am could leave you with a guilty concience when you see all your neighbors' lights go on. and just leave it off when you dont care what they say.