Advice on 2 possible upgrades please

[samleeds]

I have just joined so be gentle. Ive bought a 2002 XK8 and its a convertible in prestine condition. The 2 requests for info are as such.....

1. The stereo is pants and I need a sat nav so what are my options. Id be ooking to spend a bit and replace the speakers and maybe even a sub base to give me a decent sound so im not adverse to spending a bit more than normal if needs must.

2. Im not that impressed with the exhausts and when I kick down I dont get the throaty sound I had in my old Porche, so has anyone any ideas for a new exhaust or even maybe an additive

[StuartXKR]

The quick fix for the exhaust is to remove the two back boxes and replace with straight through pipes. Available on eBay at about £150.00. Other exhaust options are pricey.