It really depends on where you are in Kingston Borough and whether you have boys, girls and whether you are Catholic!
For boys, you will probably get into Southborough, Coombe or Chessington Community College from anywhere in the Borough. Please don't take that as a negative comment - it's just that none of these schools had waiting lists last year. Hollyfield has a smaller catchment and is, therefore, probably the hardest to get into. As I said upthread, however, I know of several year 6 boys who prefer Southborough to Hollyfield and have put it first on their CAF. If you are sufficiently Catholic, then the school to go for is usually Richard Challoner but this is always heavily oversubscribed.
For girls, the Catholic choice is Holy Cross. Alternatives are Coombe Girls (need to be reasonably close as also oversubscribed), Tolworth Girls (mixed reviews on this one, but I liked it
) Chessington and Hollyfield.
My feeling is that Hollyfield is more popular now because of the success of its Fast track, but it can't be taken for granted that any child will actually get into that stream. There are many, many very able children who don't even sit for the selectives who will be fighting for a fast track place.
Also if you live in certain bits of Surbiton, you may fall into catchment for Hinchley Wood (co-ed) - again sought after and oversubscribed.
North of the Borough I believe it's still possible to get into Grey Court or possibly Teddington, but I understand that is getting more difficult (and I'm a Southerner so not my area!)
Hope that helps
ps meant to add that I haven't considered any of the Slough Grammars - we didn't even think about those but I think Tiffinboys' DS may have sat for one or two of these and found the commute ok?