Regarding your catback question...
Here are some things I wouldn't be getting if you don't want loud.
- Borla Stingers
- FRPP M55
- SLP
Don't get me wrong... I like the above, but, they will be more agressive in tone compared to -> Bassani, Borla 14858, Magnaflow etc...
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Regarding your midpipe question...
I have had a Bassani midpipe with SLP and Bassani catbacks. Although I personally like the o/r midpipe sound better, it will be quite a bit louder when compared to a catted midpipe.
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Look under CobraChris08's sig. I think he still has the link where he put together a bunch of exhaust sound clips under one thread.
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Hmmmmm, been thinking about a different catback on the Cobra.
I have a Bassani SS one. PM if interested and we can discuss.