You're right, it is always a fun topic!
Just finished up my 6-6 with mods for the most part with no new plans for the near future, and I'm very pleased with the results!
Performance-wise, I personally don't think these cars are meant to go fully catless. Too raspy imo, so I stayed away from PCDs and HFPCs. That being said, here are my performance mods:
-18x9.5 Enkei RPF1s wrapped in 255/40-18 MICHELIN PILOT SPORT 4S tires
-Full Tein Flex Z coilovers
-Takeda SRI (sounds absolutely amazing)
-ATLP v2r j-pipe (does delete the 3rd cat but has no ill effect on sound, just very slightly deeper)
-K-tuner 91 basemap
With all these mods, I should be right at the 300 crank range and the car definitely punches above it's weight! I've matched the pull of a gutted 6mt 350z HR coupe from 45-100ish at which point he started to creep away to a car length by 130. A straight-piped e90 m3 could not pull away from me on a couple not so clean runs since he would never slow down to line up. I also just ran a straight-piped s550 5.0 through the canyons the other day and it was a very similar experience to the HR 350z with him pulling ever so slightly harder than the Z did after 100. Below that we were evenly matched and the corners, especially, were all my territory. Very respectable results in my opinion! I'm always so pleased with how this car performs, while looking so good, and still having that honda reliability.
The car doesn't draw too much negative attention at all. Vtec sounds amazing. No issues with reliability. Really one of those rare, 'have your cake & eat it too' types of situations. I think you'd come to a similar conclusion if you were to follow a similar route.
Hopefully this helps and congrats on the car. Enjoy!