Too many combo's, to list the best. Lets do some research here;
1. Long tubes are the best as far as sound and performance, But are not emissions friendly.
2. Shorties really dont do much over stock as far as performance, only sound, but are emissions friendly.
3. H pipe's give you the deep throughty sound of a muscle car, and also come in "emissions friendly" (catted) or "emissions unfriendly" (off road also louder).
4. X pipes have a more tuned sound and once again come friendly or unfriendly.
5. Cat backs are a personal choice of sound, however if your looking performance your looking for a straight through design, (borla, magnaflow, bassani, dynomax, etc) just to name a few. Chambered cat backs (flowmaster, mac, etc) give you a louder tone, but do not improve performance that much. Most will tell you a chambered muffler "should" be matched up with an H pipe; and straight through mufflers should be matched up to a X pipe. Now with that all being said what your looking for depends on what your goals for the vehicle are.
With the setup you have listed it looks as though your going for sound, and a small performance gain, if thats the case thats a good combo.
My personal preference is Bassani full length ceramic coated headers, a Bassani off road X pipe, and either a Bassani, borla, or magnaflow catback. Mind you this stuff I have listed is $$$, but it's also the best fitting, and sounding stuff I have ever used, (I still have the shorties, catted X) But have heard this setup on a couple different cars (95 Gt, 03 cobra, and a 98 cobra). I have also heard some H pipe to rustmaster combos that sounded great, but the performance numbers dont lie. Good luck on your choice, it's a tough one.