I don't post much but I thought this would be helpful to anyone looking to change their clutch and flywheel. I had my clutch and flywheel replaced yesterday. I bought a new oem nissan clutch kit and a LUK flywheel(OEM replacement) on ebay. So far everything is working well.(fingers crossed) The pedal does seem a bit firmer. There is no clatter or noise which was my main concern. I've only driven 35 miles since the install. I will post an update after the break-in period.

For those who are curious, I paid $600 for the LUK flywheel(shipped) and $337 for the OEM Nissan clutch kit(shipped)

Hope this helps.