After some research, came down to these.
HKS Hi-Power
Invidia Gemini

Is HKS worth extra $300?

Based on googled pics, I see the latter has an X-pipe. But the HKS doesn't... or am I missing something? I would want one, right?
Smooth install is important, too. If either one tends to give issues and needs extra spacers/screws/fabrication, I would like to know. Also, the quieter, the better.

Thank you

P.S. '07 HR

 

If you want quite the get the gemini, hks will be louder

 

I had the gemini and loved it, a mod buddy I told about bought it.... for the price the quality is great.

Install is straight forward, pb blaster will be your best friend. One thing, the passenger side tube that goes over the sway bar, can go on either way... position it up and if it doesn't look right flip it around and see if it looked better...key word is over the sway bar

 

I second Gemini , I couldn't imagine having an exhaust louder then the Gemini for my daily driver .

 

I second ashram's second for the Gemini. Quiet for rolling through town and in neighborhoods. But they open up really well with quality tone once above 3,300 RPMs and upward.