Well if the previous comments and suggestions didn't confuse you, let me try harder....
1) LWBS aren't for everyone, but they are great for me (5'7" 155#) and my petite wife. Very comfortable, especially with the custom replacement cushions with memory foam and inflatable lumbar support from P1 Design CustomizeYour Porsche ® Interior with Custom Seat Inserts - P1Designs
I strongly suggest you try them out at your dealer, or if they don't have any in stock, try connecting with your local PCA and attend an event. I've had nearly a dozen people try out mine and so far 75% have ordered them and 25% said thanks but no thanks. I do not intend to track my car regularly, maybe an autocross or two and a DE event. The exceptional lateral support of the LWBS is much appreciated by me on winding roads and just in general driving.
2) Navigation: I have it and I'd get it again. Yes, I use Apple CarPlay for directions, but just last week was in an area of poor cell coverage and Siri kept "working on it" but never came through with directions. And the map in the OEM navigation system is much clearer and easier to zoom in/out and read than the cluttered WAZE and Google Maps.
3) If you go with LWBS, the GTS interior package is a great deal. I'd go with chalk on arctic grey. I have chalk on my carmine red. That gets you carbon fiber and full deviated stitching as well as leather interior plus other goodies for less than the al a carte prices.
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