hi UpInTheAir
should I install the P6800XXLB4_CSC_XEF.exe - Last Modified by Samsung: 06.03.2012 ?
All depends mate.
There may be improvements from what you have now., or not. Or just experiment ?
If you're going to flash, more than likely you'll have to re-instal CWM Recovery / re root after.
Just make sure you CWM backup (nandroid) before so you can restore your current system if you're not happy, or get into trouble. Also backup apps and data with Titanium Backup (pro) or My Backup Root etc. so you can restore your apps and data. Never restore any system apps or data, especially from different ROMs.
Sent from my GT-P6810 using XDA Premium HD app