Great choice...you did it right..do the elka shocks and swaybar and laser Alignment next...don't mess with the cat...at least not yet...you're on the right path
For $1,700 and you only get the slip on that's crazy expensive. If you got a cat delete as well maybe there some value there. Slip on shouldn't cost more then a few hundred.
You need to add a cat delete and change the air filter to a k&N filter that would that would make it a cold air intake....nice I'm running two Brothers on my f3s it's loud with the k&N filter of course. !! Have fun my brother"