I can field strip my KJW GBB M4 and oil the internals faster than an AEG.
I'm anal about keeping my gas gun oiled up and working smoothly.
If you don't plan on maintaining your gun all the time, get an electric.
If you like to tinker and field strip your gun whenever you can, buy gas!
besides, you cant get any closer to real than gas.
"Weakness of attitude becomes weakness of character."