What Flash for D40

[paul8811]

Had my D40 a few months & think I need to invest in a seperate flash unit as most of my pics are indoors of the kids. Would the SB600 be the one to go for at around £125 or are they any cheaper ones worth looking at?

Thanks

Edit - OK so seems the SB400 would be fine, looks like I will go with that

 

[paul8811]

Sb600 it is then..ta guys