Renato,
Its interesting what is classed as a single malt. There are technically some blends which are sold as single malt whiskies, because the criteria used for single malts is simply whisky distilled from the SAME distillery. Personally there are some great blends and some ordinary single malts. The aging process and the grains used etc are what matters - the process.
I like trying different whiskies although recently I have been diving into Rums.
Have you tried Zacapa Rum from Guatemala? Sensational. The XO is very pricey. A friend got me a bottle packaged in a nice box, duty free for about $139 (worth about $185 retail here). Havent opened it yet. But I have the tried the Zacapa 23 which is fantastic at about $90 per bottle.
https://cocktailgroupie.files.wordpr.../06/zacapa.jpg
The Zacapa XO is so well packaged and in a unique bottle, that I am saving it. Also want to drink a couple of more Rums, to compare.