Sounds like you have made your mind up mate!
Just so you you know, although the MK5 R does not feel as raw, its actually a quicker and more capable car. Its very deceptive in its speed though. The MK4 R will feel quicker though and so provide more fun.
The MK4 is cheaper so leaves some money for mods (although you will need around £10k to turbo it)
I prefer the MK5 R noise aswell, its a little quiter at lower speeds but is a deeper note when pushing.