I got NGK copper plugs... I gapped them reasonably well, to .028 inches.

I haven't checked the wires, will do that next.

The misfires seem to happen when the engine is cranking? It is a really rough start from cold... after starting engine seems to run smoothly.

The CEL does not flash at any ...

I have a 96 850 Turbo. Here's the codes it's throwing:

P0300 Random Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0304 Cylinder 4 Misfire Detected
P0133 O2 Circuit Slow Response (Bank 1, Sensor 1)
P0137 O2 Circuit Low Voltage (Bank 1, Sensor 2)

I've replaced spark plugs, as Auto Zone ...

Looking at buying my first Volvo... both cars in 'fair' condition. Haven't had a chance to actually take a look at them in person yet.

Which is more desirable? I'm talking reliability, value, repair costs, fun, etc. HELP ME MAKE A KNEE-JERK DECISION!!!