is on offer in several different flavors.
IFR is necessary if you will be making long trips with any semblance of a schedule. But that will take just about the same amount of work as your initial PPL - just so you know
You may also want to consider putting the airplane on the N register. The more expensive the aircraft, the more worthwhile this may turn out.
Flying a slick aircraft requires you to unlearn habits developed in pedestrian aircraft that can bite you in slick ones.
I wouldn't consider them harder to fly so much as easier to screw up in
But pilots have been known to bend even 172s. No matter what you fly take it seriously.