I really liked the one on River Cottage to be honest. Only I can't stand coriander (or fenugreek apparently) so I used mustard seeds instead.
I make up the spice mix in bulk, generally using 1 whole pack of the higher quantities. Once I've fried the spices and ground them into a powder (sieve them too if you don't like bits of husk) I just store it in an airtight container.
When I'm making the sauce, I tend to make enough for 4 lots and use those ziplock bags you get in most supermarkets to freeze it in usable portions. Just be aware the chilli will cool a little if it's been in the freezer so you might need to adjust it a tiny bit when cooking.
Bit of a faff on the day but it means I only have to do it once every 4 times I make curry, so it's easier long run.
On the dried/fresh chilli front, I grow my own chillies but they vary so one can be like eating a carrot in terms of heat and the next from the same bush can be like blowtorching your tongue, so I tend to use dried purely because I know 1 teaspoon per portion will give the right heat every time.