Tip or manual: up to your friend. Yes, PDK will be better than the Tip, but it will be better than the manual, too...
If this is important to you, keep in mind that the optional limited slip differential is only available with the manual transmission.
Sports Chrono: as on other 987/997's, it also modifies the throttle response, pushes back the PSM/ESP threshold, and dramatically improves the gearbox management if you have a Tiptronic car. It also comes with a few extra memory (seats/mirrors, Homelink) settings.
Definitely a must-have option, especially with a Tip.
Short-shifter: your friend has to try it. Some can't live without it, others dislike its firmness when the transmission is still cold.
Atlas Grey: great color, refined and yet subtly different from all the black and silver cars on the road.
(that said, my personal favorite is cobalt blue, but it might be too flashy a color to your friend)
I'd go for Natural Brown Leather. I'm sure Dan L will happily post a few pictures of his car
.
Otherwise, I'd go for the black/beige interior, but then again, some owners on this forums don't seem to complain about reflections on their dashboard (I do).
You might want to try black/grey or natural dark grey, too, they work great with Atlas.
I would definitely add sun visors in leather and the rear console in leather too. The standard parts just aren't good enough.
I appreciate your will to keep the car pretty close to stock. Most people who ask about options on this board usually