it depends on what you are looking for... deep is easy to get, but do you want it smooth, or are you ok with an exhaust note that is a bit more rough? Also, how much are you willing to spend? The B&B system is pretty expensive.
I had a '87 (and my Dad had an '87 and a '91) with the Monza exhaust found in Mid America. Cheap price, and we liked the sound.... much louder, grumbly, sounds like a mean 350.
-Another way to go is to put in straight pipe instead of the mufflers... this can be done at just about any local exhaust shop for very cheap (cost me $80 on my car, had it done to my '93 as well)
-For the high cost exhaust systems, I haven't heard anyone complain about B&B or Borla... check ebay, I have seen alot of Tri-Flo sets on there recently.
-A suggestion, if you are willing to spend the money on an expensive system, you may want to try to put in straight pipe... try it out for a month or two, if you like it, great, you only spent 100 bucks, if you don't, you are only out 100 and you can spend the mega bucks on the expensive exhaust system