Thankyou again people for posting on this topic - I really have fallen for Forest Hill and can't wait to move (anyone want a 4 bed house in Darlington at a bargain price - with park views and off street parking?)
Relatives have been saying East Dulwich might be a good bet (Lordship Lane area) - but the transport doesn't look as good to me. Also, rentals and house prices generally seem a bit steeper. Does ED have anything to offer that Forest Hill doesn't?