The standard system is really gud
I had a R56 MINI One - my 1st car
Being Young i had the windows down and music blaring out
Yes the standard speakers are really gud
But i have ordered a 2011
JCW and i specced HK system as the it has tweeters (Its for the treble) and separate speakers for bass etc
They HK system is a MUST - Your mini will have 10 speakers
Mini is very quite on motorway anyway
I hope this help
Advice from a 22 year old