The two Craigslist cars you posted are 1.8's. YAWN. Unless you plan on swapping in a turbo engine I'd avoid them for anything other than commuter duty.
Per is right on about the 2.2, though the 165hp of the 2.5 is hard to resist. 2.2's were 135 upon debut and gained a bit around 98 when the ignition/injection/heads were upgraded. The 2.2 is a very sturdy engine.
The 2.5 has the head gasket issues, some worse than others depending on the year (dohc vs sohc). You either want a service history that shows they've been done or a really low price to cover the $1500 or so it will cost to have a shop do it.
The timing belt is a 90k mileage interval thing and isn't a huge big deal, other than you should replace all the front seals, water pump and tensioners while you're in there.
Aside from the occasional wheel bearing, these cars are very sturdy and surprisingly fun to drive for an Asian car.