I had a Nikka Yoichi 20 year old back when it first won some world whisky award or other and it was absolutely, completely outstanding. As an amateur I could easily pick out the nuances of tastes described by the judges. A total world apart from the standard £30 supermarket 'big namers'. Not sure if the current Nikka Yoichi 20s are as good (they cost about £180), but if you can track down one from the 'winning' casks I'll bet it'll fit the bill.