Oil leaking into Spark Plugs, Help Requested

This should be a simple question, because I know a decent amount about cars.

Basically I have a 1995 200sx se-r. Oil is leaking inside the engine onto the spark plugs, all over the tips.

So, question is, which gasket do I replace? I have heard the "Valve cover/seal gasket" others have said replace the head gasket ( found here http://www.partsamerica.com/ProductDetail.aspx?mfrcode=FEL&mfrpartnumber=9816PT&parttype=100&ptset=A )

Quick help would be greatly appriciated as I need to get this baby ready for a LONG drive.

If it's all over the tips, I'd say it the head gasket. If it was all over the wires, it would be the valve cover gasket.

Unlikely it is the head gasket or valve cover gasket. It is problaby the sparkplug tube o-rings. If the oil isn't burnt on it, then what happened is that oil inside the valve cover is making it past the o-ring seals for the spark plug tubes. You still need a new valve cover gasket since you have to pull it to get to the seals.

Yes, you're right, I just wasn't getting that specific. I consider all 5 gaskets the valve cover gasket since most people would replace them all.