platinums are great for long life, but not the best power producing plugs out there. NGK has never done me wrong though whether platinum or copper.
Don't buy into all the spark plug gimmicks though like splitfire and all that split electrode crap. getting the perfect plug for a stock or even slightly modified engine is like splitting hairs. Granted, there are some crappy plugs out there, but unless you are boosted, running nitrous, an aftermarket ignition, or indexing the plugs on a dragster for the perfect combustion event, I would say, just go with a reputable brand like NGK, Bosch, Champion etc. Same with plug wires. There are some great ones out there, but the Nologys are kind of overkill if the car is stock or even slightly modded. Stock wires are good, but you can get a better than stock set for cheaper if you want. I'm running Accel thundersports and they cost me like 50 bucks. I think the dealer charges more than that for stock wires, which is still ridiculous for only five wires. As far as changing them out, it's easy, but I would use a torque wrench to get them all the same. each individual plug box should have the torque spec on it. It's usually somthing like 13-16 lbs. Anyway, sorry for ranting.