Upgrading Speakers?

My T4 came with the rubbish radio, and 6 speakers ( 2 front door, to at back and 2 tweeters on dash). I've now got a good stereo, but speakers are not that good really. Has any body upgraded the fron door speakers or the ones at the side of the tailgate? Were they easy to fit, and any good experiences. I'm not bothered about REALLY loud, would just like a clearer, less distorted sound, that do my 4*50w stereo justice - the speakers on a friends basic Rover 414i are a bit better than the T4.

Mine has uprated component speakers in the door, but from what the dealer who sold the car to me way saying they sound like Volvo upgrades (Is that possible guys?)

Sounds like someone has put cheap stuff in your car though - my other halfs dad also has a V40, and he has the bass speaker and rear pillar speakers and the quality is superb (mind you IIRC to buy the bass and pillar speakers costs around 300 quid - or that could be euros).

Stu