Performance Exhaust and Header for Boxster

[986_inquiry]

after reading through this thread and looking at the auctions is there any reason to get the Catback Exhaust System when it costs $700 and only provides 5 rwhp more than the headers alone?

the headers sound like a much better deal, 10 rwhp and 17.94 torque for $500.

catback exhaust:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=300055722961

headers:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=300055722972

don't get me wrong i'm sure the exhaust sounds great, but $700 for 5 rwhp... $140 per hp just seems high.