++ for raytseng.
I've been caught up in the "fixing" caused more troubles. (i.e. replacing a window wiper transmission, when it was much easier/cheaper/faster to pull one from a junkyard) Now my wife bases all car repairs that I do based off this one hiccup, but I keep telling her it's a big learning experience. I wish I read the "things I've learned from wrenching" thread a long time ago, but I digress..
Anecdotal evidence. When you do plan on replacing them.
I'd buy ngk regular platinum plugs, and wires as backup. Try to not destroy the boots/wires, install the plugs, and reinstall the wires. Return the wires if you don't need them.
I (my wife's car, she obtained it before we dated) have the same car with 175K miles. The original wires were replaced at around 140k, and the plugs the first time @ around 115K. I noticed more of a difference changing the plugs than changing the wires, but that doesn't mean yours is the same case.
It is really accessible; the easiest car I've every done them on. There is plenty of room to grab the boot and wiggle and pull. I stuck with the regular platinums, I believe the OEM plugs are platinums, but not sure if they are the double platinums.
I've used the ngk regular platinum's (BKR5EGP) every time and they seem to work well with this car. I've been changing them at about every 30-35k, which may be overkill. Regular plugs would probably work as well, but you'll have to keep an eye on the gap more often. For cars that are a little more difficult to access or more powerful, I would opt for the more fancy spark plugs and replace them less often.
++ for the dielectric grease, but I've never put antiseize on the ngk plugs. I did torque them with a torque wrench, but I don't know the torque values off the top of my head.
Good luck!
Also, I don't advise this as well either, but the original timing belt/idlers was done at 122k, well over the recommended 60k. I might stretch this one to 185-190k.