[Scott]

You can do whatever you want to safeguard your car...but the fact remains that if someone wants it bad enough, they will probably take it.

That being said, I really don't think your engine getting stolen is that much of a concern. Pulling an engine is not an incredibly easy task. They would need a fairly extensive tool set, an engine hoist to get it out of the car (or some sizable car jacks to drop it from the engine bay), and quite a bit of time on their hands. Time being something most theives aren't looking to waste. The more time they spend committing a crime, the greater the likelihood of them being spotted and aprehended.

If they are going to take the engine, odds are it would be after they've stolen the entire car, and could get it back to a safehouse or chop shop where they can take their time.

So, get a GOOD alarm system, try to park the car in more secure locations, and always just be aware of your surroundings. And like someone else said, seat theft is the most common item of value stolen from an S2000. Unlike an engine which could take up to an hour to remove (even if you're rushing things along), the seats can be gone in five minutes with nothing more than a pocket knife to slash the top and a cheap socket set to undo the four bolts holding the seats down.