I don't understand the "Made by Samsung" moniker.

Anyways, just from reading the kernel you have a REAL note, not a counterfeit.
Now for the bad news, you've got the "Super Brick" kernel so flashing a rom will be devastating to your phone (if you've got a affected motherboard/emmc). Even using your phone normally theres a chance you'll brick it under heavy IO use case (large file copy/delete/intensive application).

You need to install Odin PRO to your computer and flash Franco's r5 kernel to cure SuperBrick.
(optional) Then use ChainFire's Triangle Away application to conserve warranty.
Use the custom recovery to make a Nandroid backup, also backup your EFS.
If you want to experiment with custom roms and kernels then its a good idea to also backup (contacts, call logs, sms, apps) with various Free Apps from the Market.