I have over 200K on original OEM wires on one with no issues, misses, or other. I change the double platinum plugs about every 50K since it is easy, cheap and I can look at the plugs to see if something is going on internally.
I always either have them turned or put new ones on. There are specs on thickness after turning so you need to check this.
From Haynes, Front 0.98 inches, Rear 0.409 inches. There may be a minimum thickness stamped on your rotors so I would check that as well. O'Reilly's turns rotors though I have to say I have had hit or miss luck with them. A lot of folks just replace them since the cost delta is probably not that much but I always try to turn them when I can as long as they meet specs. While you are doing your brakes, you might want to look at flushing the brake fluid. It absorbs moisture and corrosion products over time and needs to be flushed with some regularity. If you do this, be careful as you do not want to let the reservoir go empty or you will get air in the ABS system and it may be difficult to get out.
You sir, are very lucky -- or did not notice a gradual degradation. Sometimes bad wires don't cause an obvious misfire, but just a slow decline in power. On my '98, one ignition wire, located close to the exhaust manifold failed in 2000, with about 35,000 miles. I replaced the entire set (with OEM wires), and it held for a few years. Despite the heat shield on them, the exhaust heat causes cracking in the rubber insulation and shorts to ground develop. Sometimes they are dramatic and there is no spark at all, and sometimes just cause a weak spark.
Ignition timing is not adjustable. The PCM (computer) controls it, and it varies constantly, depending on RPM, throttle, and a dozen other things. The 14.5 deg that you saw (at idle, I guess, because it can be much more under load) doesn't mean a thing. Just leave it alone.
I have had misfires and intermittent misfires from bad plug wires. I have changed plug wires that are old (without misfires) with new wires and did not notice any difference. If the spark is strong enough to ignite at the correct time then I think the wires are okay. I think you would notice a significant loss of power or misfire if the wires are bad. They may be closer to failure if they are old and you may want to do PM replacement but I do not think you will see a power gain by replacing wires that are not causing a noticeable loss of power or misfire.
