Really if you get the si over the sport touring with all the extras goodies your only getting a more powerful and lighter car that doesn't look nearly as good. Plus the sport touring has a better sound system.
X pipe. I'm getting ready to do cat delete on my 19 gt tomorrow. And i have the xpipe with super 10 Flowmasters. I'm gonna set car alarms off like crazy. And my neighbors are probably gonna hate me. When I start it up at 15 to 5 in the morning everyday, but you know what oh well they will get over it.
I did it to my 10th gen Civic, but only the "civic" badge. I left the "vtec turbo" badge on other side. I think it looks cleaner with no badges, just the H, but didn't want the car mistaken for a lower model without the vtec turbo. The Civic badge however, who cares? Everyone can see it's a Civic. I also blacked them out like yours.
S550s need a H pipe as imp they are very raspy vehicles. After watching video I'm left with two opinions. Regular parked reving the Hpipe sounded better but when actually gunning it while driving i found the X to sound better.