Not personally no - I am interested in any first hand experiences too!
I have picked the Meridian audio anyway, as its not vastly overpriced and in my previous experience with owning a BMW with the standard, and then one with the upgrade..it has definitely been worth it in the past!
I've heard both the meridian sound system and the standard jaguar system. both of them are good for vocal quality i.e radio talk shows. However the meridian system is much better when it comes to music. I would recommend upgrading!