if you're feeling extravagant then a couple of threads of saffron in rice is excellent, shame it's more expensive than gold (by weight)!!!
I'd strongly agree with coriander, garam massalla and cardamon.
Good luck and let us know what you think of the spices.
Mustard seeds or powder are good too.
don't forget to get a jar of tabasco too.
Also Asda do a big tub of cajun for about 90p in the spice rack, great on chicken and prawns!