RE: Ignition Upgrades
Sure, coils fail. But a stock replacement is plenty strong enough, and there will be no gain to be had by "upgrading". Actually, i don't even think there are aftermarket upgrades available for the COP system, but i may be wrong.
Once you spend the money on a high dollar motor, then it might be worth it to look into ignition upgrades. Even at that point, though, i don't think there will be much to gain. It's not like we've got breaker points and a distributor to upgrade, we already have a pretty state of the art ignition. Even for the gen 1, most of the ignition upgrades available are just placebos.
Put in good spark plugs (and wires on a gen 1) and make sure your stock ignition is in good working order. Other than that, you should have no need for a stronger ignition unless you are running a rediculous amount of nitrous, boost, or compression.