I have an O/R H-pipe with normal magnaflow chambered mufflers. LOVE the sound, wanted to buy borla's but just love the "old school muscle car" sound it has. Really depends on the tone/sound you want. Do you want an exotic, raspy tone? Get an x-pipe with borlas, bassani etc. Want an old school muscle car sound? Get an H-pipe with magnaflows, flowmasters etc. Here is my car doing a crappy 1/4 run, I have a HCI too, but it basically sounded like this WOT stock, just not as loud.
http://www.youtube.com/watch?v=sm00rqlett0