Exhaust, intake, Exhaust, intake, man I'm exhausted Options

[Swifty]

I've got my car now, so I want to know which exhaust is the best, ive been looking around and I think that either Tanabe or HKS have the best looking cat backs, problem is the only manufacturer for the 6g Celi is Greddy with thier SP cat back, I'd get this but it looks kind of funny (No offense ) I mean the tip isnt the best looking and the piping doesnt look much wider or free'er flowing than stock so I was wondering:
1. Can I someone plz post pics of an installed Greddy SP
2. Would the 5g ST-185 HKS Hi-power cat back exhaust be able to be put on a 6g GT, and would this be a good idea?
3. If I were to get a universal Tanabe medallion exhaust where should I go for the piping?
4. Are there any other exhaust manufacturers for the 6g
-----------------------------------------------------------------------------------------------------------------------------------------------------As for the intake part I'm strongly considering the injen one for the 6g, but was wondering if it was a cold air intake, even if its not does the heat shield help against the hot engine air, if not are there any good CAI for our gen cars? Also I've hears that the Blitz filter is one of the best out there, if this is true how would I make it into a CAI?
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Thanks in advance for any info

[silentmelons]

The best option is to get one custom made. I have a 5" slash cut cobra backbox (ascar don't know if they are out in the states) which cost me 200 pounds which is fairly expensive but is a well nice box. The rest of the system is 4 inchs all the way through and is all stainless steel. So all in all it cost me just shy of 450 quid but it looks and sounds better then anything HKS would give you and it is pretty much half the price plus you have the choice of pretty much any backbox which is a big bonus if you are as picky as me. At the end of the day it may be a bit more hassel then buying a pre made full sys but the results are a lot better