H-Pipe Experts, PLEASE HELP!!!

Here's the deal. I need to know some basic in's and out's of the H pipe before I purchase one. I already know the obvious like more low end hp for H pipe and more high end and overall hp with X pipe. And how the hp difference is only within 5 hp's. So sound is what i'm looking for! I already have a 2 1/2 MAC catback with 3 1/2 tips on a 97GT vert. The sound I want is a ridicullasly loud, deep muscle car but also with a rasspy race note. Kinna like a deep tone version of Steeve Mcqueens Buillit or a deep tone Trans AM (no offence, I hate anything non Stang but I do like the T.A sound) Anyways...

1. They say x has rasspy and H has deepness, My Mac is all deep and barly raspy, can you get a raspy sound with an H pipe?

2. If I do get the H pipe and put it on, will I be able to buy cats later on and weld them on? And if so, will they pass the emmisions with 2 welded cats on them?

3. I have a 97GT vert. Will I have any computer problems o2 sensor or check ingine light? Anything at all to do with the comp?

4. Just how loud or big of a difference is an aftermarket H with cats vs. a straight H pipe?

Please respond with HELP if you know anything about H and X pipe's