First read the section on gasket failure - http://forums.mg-rover.org/showthread.php?t=243523
From your description, you don't seem to have any of the symptoms and K series head gaskets hardly ever leak oil so I think that is coming from somewhere else.
The sweet smell you describe does sound like you have a coolant leak from somewhere. Check around the head gasket joint line especially under the exhaust manifold. This is where they tend to fail. If you do find anything, check that it is not leaking from the inlet manifold gasket and then running around the head gasket joint line.
Should it ever come to changing the gasket, a good price would be £400 plus, including the belt and water pump that should indeed be changed at the same time.
From your description, you don't seem to have any of the symptoms and K series head gaskets hardly ever leak oil so I think that is coming from somewhere else.
The sweet smell you describe does sound like you have a coolant leak from somewhere. Check around the head gasket joint line especially under the exhaust manifold. This is where they tend to fail. If you do find anything, check that it is not leaking from the inlet manifold gasket and then running around the head gasket joint line.
Should it ever come to changing the gasket, a good price would be £400 plus, including the belt and water pump that should indeed be changed at the same time.