Does it have HAVE to be a 25 year single malt? Look into the the Macallan (25 year may be pricey, but their 18 year is well under your limit and it's a winner), other great choices - Highland Park 25 year, Glenmorangie Malaga Wood Finish, Talisker (I"m not too keen on Talisker, but I'm in the minority on this one), Balvenie and Glenfarclas.