If you like Irish, I really suggest you give even the cheap Bushmills a try. It's something different to Jamesons. Jamesons is a good whisky - there's a reason it sells so well. It's not the best though. Typically, you'll pay more for better whiskies. Like with Scotch - Glenfiddich 12YO is just fine. It's "cheap", and it's just fine. Pay a little more though (that R300 more) and you start getting exceptional whiskies for great money. Glenmorangie Lasanta 12YO, for example.
Same with Irish whiskies. You pay R400 for a bottle of Select Reserve. Take out a bit more for a Teeling Single Batch though, and you'll start seeing why you pay that little extra. With whiskies you can cheap out and get ****, or you can mellow out and get average, and then, IMO, your ROI starts flattening out.
For example, I struggle to think of a single whisky I have tasted to date that's worth the money when it comes to whiskies priced over the ~R1,200 price tag. The most expensive whisky for me, to date, that's worth the money, is the Ardbeg Uigeadial. For me, the sweet spot is between R500 and R900. Some real gems to be had there. And no, it's not snobbery, that's just how it is.