Using UEFI for RHEL VM Instead of BIOS questions

Getting ready to move away from RHEL5 and to RHEL6 and I want to take advantage of tools like gdisk Vs fdsik, and I believe if I were to enable UEFI when building out the new RHEL6 systems will allow me to do this, correct?

I've noticed when that I've enabled UEFI for the RHEL6 VM, that there is a partition that appears when building out, called /boot/efi. Typically when building and using BIOS, and creating a /boot partition, I never placed this under LVM, would this still be the same, or can we pub /boot/efi under LVM?

Also I wondering if anyone has had issues where they might have a RHEL VM that was created with BIOS or maybe with UEFI and then they had to swing disks to the opposite boot loader and if there were any issues?

The reason I'm asking is that I googled around and wasn't able to find any exact info on this topic, or I wasn't searching with the correct terms.

thanks