I would resurface or if you want to replace that's fine too especially if you plan on driving it for a while. A grooved or heat cracked flywheel may cause you some chatter or grab problems and will shorten the life of the clutch disk.
Another note from my previous post is to NOT buy remanufactured. Find a company that sells NEW matched sets. You will be allot happier in the long run.
One other note on flywheels; When you remove it and have it surfaced or replaced, put a dab of lock-tite on each of the bolt threads and torque them to specs.
If you don't, they have a habit of backing off, and that is really bad, and can be really expensive. I have seen flywheels come loose, rattle around, and bust engine blocks and transmission cases.