Well Im just in the process of trading my 58 plate 26k mile GTI in for an 09 32k mile MkV R32 because like you , I have a thing about large capacity multi cylinder engines and their soundtrack , but if I could , Id keep the GTI AND buy the R32 as well , so I would suggest just keeping what you have - the MkIV R32 is already a classic , just keep it and use the GTI as a daily , best of both worlds IMHO.