It really doesn't matter what apples you use, they all give the same result... I use a selection of bramley, cox and katy as thats what grows in my orchard. I also added some pears (conference I think) last year and that made a hearty brew! Home-made cider is never going to taste like bought cider so its down to you to experiment, if you think its too bitter then add some pears, if you think its too sweet then ferment it a bit longer... You'll never have 2 batches the same but its guaranteed whatever you use it'll make you squiffy!