Which whisky for a christening present?

Hello all,

First time posting here. I've recently been asked to be a godfather, and would like to buy a bottle for the little guy to open (or sell) when he's 18 yo. Would ideally be bottled 2024; year of birth and be aged 18 years.budget is £150 ish, can go over a bit for a good bottle.

Firstly I thought of a Maccalan 18. But this was over budget. Then I looked into a Glendronnach 18; reviews say they have declined in recent years. My last idea was an 18yo GlenAllacie; one of my favourites.

So, have I overlooked an obvious choice? Any recomendations or ideas are welcome. Would love to get a special bottle and hopefully he'll share with me in 17 years time.