Arrgh have got ourselves into such an unexpected pickle, of a good kind it seems 
DD9 is quite a bright thing and currently attends an ok but not especially meeting her needs local primary. her last teacher suggested we consider private education for secondary as local state secondary is pants (apologies to those sending their DDs there, its "improving")
Dh was initally very unsure, saying we could not afford it etc, but agrees to attend open morning of local independant school.By the time day arrives, he has decided that we can afford and we should take serious look.
Well it was soo much better than we had expected, it was like it was tailor made for DD's abilties - in fact she was having in depth discussions with the history and english heads of departments about their curriculums at one point 
DDs whole body language and demeanour changed for the better whilst we were there and at one point she exclaimed "this is fab,can I start Monday?!"
Looking at the differance in her and how much we know she is NOT getting her needs met at her current school, DH and I are now feeling she should move there sooner. The school have actually offered her a trial day whenever she wants to come over and currently have 2 spaces in her current year group so she could in theory start whenever we want. I was initially thinking year 6 (so next spetember) but now I am thinking after Christmas.
DD however has become very conflicted as she does not want to leave her friends and the year 6 "graduation" with them.
reality of waiting till year 7 admissions is only maybe 20 spaces available and they are lways oversubscribed. No junior who passes senior entrance exam (thats all of those that take it usually) has ever not been given a space 
I realise I am currently lovestruck with nice shiny private school so am posting here as I need some senible advice. I also dont want to upset DD but need to do best for her future arrgh (mothers guilt moment!)
Any thoughts folks?