Have tried various over the years, thinking now Sunset or Spartan ?
Any opinions / experiences much welcomed , good eater, flavour and disease resistance, slightly to cold here in Dublin for cox's Orange Pippin
Well you really need three apple trees - an early season ripener that you pick and eat such as Red Winsor or Worcester Pearmain.
A mid season apple which will keep for 2 or three weeks (Spartan although classed as a late ripener and will keep tends to lose its flavour the longer you store it - so I'd consider it more a mid-season apple).
And a late season apple - good ones are often the traditional varieties as they were developed as good apples to store over the winter - varieties such as Braeburn, Granny Smiths and Gala are good keepers, as are a lot of the cooking apples - I've stored Bramleys and used them as late as April of the following year.
But ... what you should really do is decide which apples you like the taste and texture of - and there are so many varieties to choose from - and then grow those because it's pretty pointless growing an apple which you know is going to keep for months and not like the taste of it !
You can also get from specialist growers family fruit apple trees where the grafting has allowed three different (but compatible pollinators) to be grown on one tree - so you can get an early, mid and late season apple all from a single tree. There is even one with a cooker and two dessert apples now available. Not cheap (about £35) but useful if space is limited and no more expensive than three separate trees. (If you like pears there's a couple of good family ones as pears only ripen once they are picked so you can enjoy quite a long pear eating season in the same way as a family apple - but they won't keep so you have to eat or bottle them).
They have a number of apple tastings over here where, in the picking season, you can go and try a lot of lesser known varieties and order trees of those you like - but you may have to trudge your way round Dublin's greengrocers to find anything other than the usual Golden Delicious etc etc.
So many varieties of apple to choose from that I would hesitate to recommend any one particular apple but for a good all rounder, disease resistant, late and heavy cropping keeper I like Braeburn - crisp clean taste, not too sweet and the wasps seem to stay away from mine. It's a bit of a boring choice but it's probably why it's so popular. I've got several other varieties for their taste but I'm still eating Braeburns that I picked in October and the rest are long gone ...