[gtroth]

You have to be more careful about the head for the S (rare and pricey, and more valves to bend). So you'll want to do the timing belt and chain tensioner immediately. And there's a real good chance that there's a clutch in your near future so you might save your money for that (same goes for any 944 with those miles (er, kilometers).

Honestly, there's a pretty good chance it's going to need all the usual things and you'll end up dumping several grand into it (and tools) over a few years. That's what I did and I bought an already very nice one for $7K. That said, i don't regret it for a second, but that's me.

edit - I hate to say this, but for <$1K, you could probably get your money back out from the head alone if it came to that. Of course we'll all yell at you (unless we need a head).