If you have to choose. I would suggest upping the interior. You will get more use out of the creature comforts compared to the 9% increase in power. The power kit, although very nice, is not that big of an increase unless you are tracking it.

 

That's spot on!

The powerkit only has a slight advantage at high revs (revs easier above 5500rpm). And it is 0.1 sec faster to 60.... That's about $200k per second (Turbo S seems to be a bargain!)
The interior is the place you spend most of your time with the car.

 

Full Leather - I didn’t have full leather in my 997S and hated staring at all of the plastic. It was a must when I ordered my 991S and I absolutely love it. As you mentioned it's a $120K+ car and it should feel like it every time you get in it. Plus, full leather includes door trim to match cup holder trim and alcantra on the pillars.

PSE - When I was contemplating my order I kept reading over and over again that its sounds amazing and it really does. I'm very happy with this choice as well. It sounds better than my aftermarket exhaust (A.W.E.) on my 997S. I know it doesn’t add any hp but it sure does sound amazing.

Sport Chrono – I like it for the mapping on sport & sport plus. Definitely more fun.

Black Headlights w/PDLS – I ordered this as well and it looks great on a white car (and any other color for that matter).

Smoker Package – Seems like a no brainer, it’s nice to have the cover as it keeps the whole center console clean when closed. Otherwise you just have what looks like an open compartment with a missing cover.

 

Before you commit.. Give PDk one last thought... I was absolutely convinced I wanted M7... Then I drove pdk it a couple of times...

I wasn't super excited about it until putting in sport mode.... Then it was an immediate "oh my.......".

I'm going PDK and I'm a life long auto is for wusses (although I do feel like I'm cheating on my M7 girlfriend.... )

 

+1 I think this is gonna be a reaction of a lot MT enthusiasts when they drive the new PDK
Still love both MT and PDK, but PDK really is amazing.