Found some that are $20 cheaper than ACP...but they'll gouge you on the shipping...like $50.
As for exhausts...ACP seems to be pretty good in terms of price (unless you have further hookups...ask Tim if the cost of being a member will be less than the savings you get from the discounts...I ordered mine too early, so I didn't get any discounts

). I was looking into this yesterday and you pretty much only have 3 options for exhausts if you dont plan on any type of hanger modifications.
Comptech
HKS
Thermal R&D
All the catbacks require some hanger modification.
Reason why I DID NOT go for HKS is
#1 HKS is the second choice after comptech (in popularity) yet it is not even 100% stainless steel. :dunno: Read up on people with other cars saying that their HKS setup is rusting. But...I doubt you drive in salt roads very often so it may not be an issue.
#2 I was concerned about noise & clearance isues and wanted to keep the tip diameter as conservative as possible.
#3 Apperantly like Shyne said, you'll eventually burn off the rear lip if you have a bodykit.
#4 With the repairs you would spend on lenghtening the HKS...it would almost be better to get a more expensive axleback instead (Comptech anyone?). I went with Thermal and decided to risk it. My only complaints? Well...for starters it's oval so it doesnt follow the rear lip curve anymore. If later I find out that I would have to lenghten mine...then I'd be pissed cuz I would of gotten the Comptech's instead.