What ones are best to get?

Ive got NGK BCR 8ES at the mo, dont want anything fancy jus any other recomendations?

past couple of days the cars not been wanting to start, its slowly got worse so im thinking/hoping its the plugs...altho they havent done allot of miles theyre 3yrs old and have been fouled up a few times due to another non starting problem and I reckon their done now despite the car running fine when I do manage to get it started!

also, if its a case of having a weak spark, what stuff should I check?

Its got new dizzy cap and rotor arm, old leads and old plugs