I'd definitely NOT go for the CD changer, especially now the internal CD player plays digital formats such as .mp3. Also, iPod integration is rumoured to be imminent.
I'm very pleased with my sports seats; I find they offer much better lateral support over standard seats. I would recommend them.
In hindsight, I would have found the tyre pressure monitor option very useful. It will become a standard option in the future if not already so, so check with your dealer to see when that is.
Try cars with and without Sports Chrono to see if you want it. It cannot be retro fitted. It offers no performance benefit but makes the pedal response sharper, and therefore the car seem faster. You can of course get the same effect by pressing down quickly and aggressively on the gas pedal. The flip side to sports chrono is the dash clock which a lot of people do not like as it's a bit gimmicky.
I have BOSE and it seems to be an automatic tick to add nowadays, but to be honest, if I had to choose between BOSE or Porsche Sports Exhaust, I'd go for the PSE.
I had the sports shifter retro fitted and prefer the shorter throw it gives.
Telephone module is rubbish quality"¦ do a search on Porsche forums in general and you'll see lots of people reporting problems / poor quality. You will also want to get a replica SIM if you go for this option, so check with your network if this is possible. Not all UK mobile networks offer this.
Sat nav, again seems to have a lot of problems. I wouldn't be happy spending £1+k for the grief it seems to have given a lot on here. You cannot add speed / "˜safety' camera info to it either.
Choose the colour you like best. If you ever part ex it won't matter. Call me cynical, but if you pick a silver / black / a n other "˜safe' colour, the OPC will tell you that they can't offer you much cause they have too much stock of that colour. If you pick something a bit more "˜risqué', the OPC will tell you that they can't offer you much cause it's not a popular colour. You'll be stung either way. You have to live with it so go for what you like the best.
Remember, its so tempting to add everything, but be prepared to financially write off any extra options spending you do, as you will not get any back at resale.