I agree with everyone above. Don't take the OTA. Since you have MDK you also have a custom recovery and can flash many ROMs. There are many flavors on 4.3 and 4.4 available currently. Read about them, the available features, and such. Then decide what you want.
So much to see, so much to do.
Current Device: Samsung Galaxy S4 On VZW
Motorola Photon 4G | HTC Ozone on VZW | Moto Droid X on VZW (Rooted flashed, etc) | Motorola Q