RE: I need a backup
That's an excellent suggestion from Arch. Wait for the Vanquish.
Having recently made my first foray into 2-meter electrics, I can say without hesitation you will not regret it. And I will predict right now that the electric ship will quickly become your primary and the other glow bird will become your back-up.
Yes, electric is different, but it has quite a few advantages as Arch has noted, and also it is a LOT easier on your airframe and your electronics. While an aileron servo might last a season or 2 on a gas or glow model, there is no reason it would not last several seasons on an e-bird, so much less is the vibration. Using a well-balanced and lightweight carbon fiber prop, it is simply amazing how low the vibration levels are, even at full throttle. And linear throttle response throughout the flight envelope is so much easier to set up on the Tx and to execute while flying.
Also there's the noise consideration and the clean up aspect for glow and gas. Practically non-existent with electric.
The big downside for me with electrics is the field charging of batteries. However, I bit the bullet and made a nice modular charging station with 2 Cellpro 10S's, 2 power supplies and a Honda 1000-watt generator, which is a common set-up in e-pattern. Battery prices are coming down, and it is possible to get a PAIR of 5000mAh LiPo's (connected in series for one flight pack) for about $80 (!) from the Hong Kong and Singapore suppliers. F3A Unlimited also has some very high quality primo packs (low internal resistance) at very good prices.