LPD and 130 are my two developers that I use. Nothing lasts as long as 130 in my experience. LPD is quite good though! As far as changing image tone with dilution don't expect huge changes, it is very very subtle, some may not even notice. You'd be better off using LPD at 1:4 or 1:5 for a warm tone developer, and 130 with some benzotriazole as a cold tone developer. Both are great developers, you can't go wrong either way.