A second links opened last year at Rosapenna, started by Eddie Hackett, completed by Pat Ruddy. Apparently it ventures further into the dunes than Old Tom's original.
That's all I know but if Rosapenna does make it into the top 50 it can't be at the expense of Newmachar. Why? Well, googling around for information on a course unfamiliar to me I came across a quote from Peter Alliss at the top of the home page saying it is "destined to become one of the top five inland courses in Britain". Scrolling further down I discovered the designers were Dave Thomas and, er, Peter Alliss.