Best plugs for FZ6 S2 07 reg.

[hawkeye]

My bike is due for plug change this year on service but been looking on the bay and there is a variety of types and prices , want something she will run well on and reliable spark so question is should I fit standard or iridium or another .

http://www.ebay.co.uk/itm/130807579313
seems a lot of money are they worth it ?
Need a full service kit really ,plugs ,filters and oil but cant find a kit online reasonable price , where do you get yours ?