How do I vary my curries?  At the moment I am using madras curry powder along with cumin grown coriander turmeric paprika chill powder

The madras curry powder seems to be the main flavour that I can taste
I am looking for a balti spice blend dose any one know how to create one or can you buy this like the madras curry powder

Also how do I create those amazing colours that curries are   

cg13,

quite a difficult question (very broad)

as gary suggests the starting point is the download on this site of Bruce Edwards to get a good background - i too think it's essential reading.

for me i have to break the "curry" into the various parts - base & frying stage. the frying stage then breaks into technique, spices and veg. the spices break into spice mix and curry powder.

you ideally need to try a few out to get to what suits your pallet. for me i'm currently on base: rajver, saffron, ifindforu. technique, domi's, spice mix, LB+, curry powder shop bought rajah hot madras (it isn't hot). veg down to each recipe but probably to include green pepper, onion and most definitely fresh coriander.

hopes this starts to help a little.