My intention is to get three new eating apple trees. One I would like to be
a russet.

Is a russet a russet or are there different types?

For the other two, I would like some recomendations as to some nice ones.

I'm not bothered about the blossom period as we already have a few various
old apple trees.

Any advice on buying also appreciated.

I shan't be doing this very often so just want to get it right.

mark