for years on all zetec e fords (mostly 1.8 and 2l focus) i've used ngk platinum plugs, never found anything better!!! same as all plugs though make sure they're gapped to 1mm
leads wise i now use magnecore kv85 9red ones. blues will be fine too. runs smoother with them to old oe ford leads. mine btw is a 2l focus zetec with full zorst including 4-2-1, K&N pannel and uprated cold air feed and it makes 150 bhp with 104k on the clock 8)
edit: thats 104,000 miles btw