when he turns 40 in 2010 you could also buy a bottle from 1970 wich would be cheaper then a bottle of 40 years of age. but even a 40yo strathisla doesn't have to cost you more then 200 to 250 pounds.
a nice bottle from 1970 will be between 125 and 175 depending on the distilery.
feel free to send me an email with your budget and I am sure I can find you the perfect gift
vintage_1971@hotmail.com