jaehoppa

I have a clutch buzz and will be fixing it soon..but have couple of questions..
(MY00, 62k miles)

1. People recommend OEM clutch parts but isn't it same as the ones I have right now?? and wouldn't it eventually occur again or did honda replace all OEM clutch parts that are on the market now?

2. I heard I don't have to replace the flywheel..my question is..does it wear out like other parts? should I reuse it or get a new flywheel??

3. I saw a clutch kit with ACT "lightened" flywheel, how does lightened flywheel effect the feel of the whole clutch system and driving??

4. I found a guy in the forum selling OEM clutch kit for $400 excluding the flywheel..and he said they are Exedy (said OEM clutch parts are exedy..true?)
should I buy it?? Anything I should find out about it??

Well, my goal is to fix the clutch buzz so give me any recommendations or advices..and any websites I can buy the parts..
thanks..