Firts Raptor Question, Full Exhaust Question

[robb15033]

Im excited to be able to have you guys help me out choosing a new exhaust system for the a guy I (and everyone else) works for.
Im going to provide him a list of parts for a full system.
Just started researching. I have a coupe and a Cobra, I designed the exhaust with both of these, very unique systems. I have some questions. If money isnt an issue, please help provide opinions to help me. PLEASE
-Preliminary plans are to install true dual system.
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**Which set of Longtube headers fit best during installation? ~That's my #1 question right now.
SYSTEM I WANT INSTALLED:
-*Longtube headers, hi-fow cats, ProChamber, Spintech (6000 Series, maybe 9000 Series) mufflers, tips by Dr Gas. `SCT handheld with Dyno tunes.


``Please chime in, im a nooby with the 6.2 Raptor

 

[robb15033]

I see a full system by KOOKS that looks nice. LINK: http://www.stage3motorsports.com/KOK-Bundle-14P-2010-2014-SVT-Raptor-6-2L-Kooks-Complete-Exhaust-Bundle.html
I really like the Stainless Works system LINK: http://www.americantrucks.com/stainlessworks-lt-headers-catted-62l-1214.html?utm_content=AT+Exhaust+-+Headers%7cStainless+Works&utm_campaign=campaign=09plus_No%20Years&utm_source=Google-pla&utm_medium=Shopping&utm_term=&AMID=stainlessworks-lt-headers-catted-62l-1214-FPReplacementV1
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The SW system leaves choices for midpipe and mufflers. It's difficult to research so far, I thought that most SVT owners would be giving that beautiful 6.2L engine a personality & sound it deserves. Clearance looks tight as sh*t.
Does the stock system sound that great to most owners? I dont think so.