Sound is the reason I've not upgraded to any of the sports exhaust systems be they MMC, Librands, or RPI. Until I can test these at highway speeds I won't be doing an upgrade. As for other options to consider... definitely the walnut (or other wood) dash, definitely wire wheels. I would not bother with mohair hood (unless you drive with hood up a lot) but do consider mohair stored hood cover and or tonneau. I modified my hood after delivery with a zip out rear window for traveling on very hot days. As for aircon, I have it on my 2010 but then we drive in Australia in temps in high 30's, low 40's! It is moderately effective.
