For exhaust, you may want to look at a Megan Racing MR-S. You can pick them up on Amazon.com for around $125 or so. I put mine on this past weekend and really like the sound. I have an ANSA muffler on my roadster. The ANSA's run about $220 or so.

Megan Racing muffler:
YouTube - 2004 Chrysler Crossfire ("Naomi") with Megan Racing MR-S Muffler

ANSA:
YouTube - 2006 Chrysler Crossfire Roadster with ANSA Sport Muffler UN0827

My coupe came with tinted windows when I bought it a few months back. The tint is dark enough for me:
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