I guess the only problems i've had have been the radiator (cracked near a mounting point) and the halfshafts. The radiator was fixed by the place that sold it to me, the tranny shop messed up a speed sensor when fixing the halfshaft, so I got a check back from them for $350 for a $170 halfshaft job (I fixed the sensor myself for about 50 cents worth of electrical connectors and tape)
I've lucked out, the only repairs i've needed have actually made me a profit. lol
One thing I forgot to mention earlier is that you might want to have the oil pressure checked. Is there a check engine light or an oil pressure light that comes on when it's tapping? If you noticed the tapping all of the sudden it might mean the oil pressure is not building quick enough, and that's DEFINITELY something to worry about. Repairs might be more than you want to spend, but it's certainly better than sitting on the side of the road with a seized engine. Before you so anything though, run some oil conditioner through it and have the oil changed. When is the last time the timing belt was replaced?
btw- On the other hand, my previous car, a 1993 Chrysler LeBaron, went from about 62,000 miles to 157,000 miles with a bad lifter tick, so sometimes it's something you just have to live with.