As above can anyone tell me the best and easy way to change the radio for something  just plug and play a bit more up market that wont need any software upgrade just want to try and lift the look of the dash abit :no:

Which unit do you have in at the moment? You could always upgrade to a Bolero or Columbus unit.

I have the Stream radio works ok but just looks abit dull dont want to fit anything that will need a lot of upgrading

I have a Bolero in mine and it is great. Like Mike said, you will need a new gateway and a 2:1 radio antenna cable (apologies the name escapes me) but once in, they work very well and look the business.