We can't all have/afford to run a 4.0 v8 jag
Neither could I before I became an old git. I'm probably basing my bias against your average aftermarket exhaust on the herds of Nova/Corsa/Saxo "enthusiasts" round here who think that loud=good no matter what. I expect a proper car like a Rallye does sound nice if the exhaust is done properly.
As it happens, the Jag is stupidly quiet and I've got my eye (ear?) on some nice stainless steel back pipes.....