I need a new cheapish printer, copier, scanner. Needs to print colour. Smallish footprint would be nice.
But the problem is it must be quiet.

No seller I have visited in Plymouth has any clue how noisy their machines are and none will test to see.

Canon, Kodak, Brother, HP and Epson all have sub £100 inkjets with the appropriate functions. Anyone have experience of the comparable noise levels or any recommendations.

a very quick search found a site (in india! )
http://compareindia.in.com/products/printers-inkjet/59-1
which lists the db of many printers (note they aren't all scanner/copiers)
ranging from about 6db to 46db!

Our canon printer has the ability to change print speeds to make it a lot quieter

Many Canon's have a quiet mode
Depends what you want but they all have a spec available
eg
http://www.canon.co.uk/For_Home/Product_Finder/Multifunctionals/Inkjet/PIXMA_MG6350/#p-specification