I am still pondering the idea of DXIA2 (Taril). I don't want to lose the warranty on my phone. Lets say worst case scenario the usb port on the phone breaks, Samsung would not have to fix it if they see you have a cooked ROM... Probably very unlikely it will though. The other thing is to load DXIA2 you need to flash the ROM twice which increases your chances of bricking the phone (the MONAHANS issue).
I understand your concern Park,but if its any consolation i have flashed my OMNIA roughly 20 times,trying to determine which ROM is best for me,from the official ROM's to most of the cooked ROM out there,and i have never had any problems what so ever.
If you take these steps before flashing it reduces your risks a lot:
1.Reboot PC
2.Use a PC with WinXP prefferably
3.Soft reset your Omnia,Hard reset even better...
4.Make sure ActiveSync 4.5 or later is installed.
5. MAKE SURE THE SAMSUNG MODEM DRIVER IS INSTALLED (IMPORTANT)
6.Limit the amount of apps running on your pc,prefferably turn of antivirus etc.
Well thats the exact steps i took,and like i said i have had no issues of any kind.