I have an Electristar that I fly quite often. It's a sweet plane IMO. I've not done a nitro to electric conversion, but I did recently pick up a Pulse XT 40 which is capable of either glow or electric out of the box. That means the battery compartment is built in.........or go with the fuel tank, owner's choice.

I use the NiMH batteries in my Estar also and they are relatively big which might pose a problem if you were try to install them into something like a Pulse, but some minor mods shouldn't be too difficult as long as you consider the CG. Point is, I see an awful lot of ARF kits out there that can go either way so finding something that will do what you want may amount to nothing more then finding the plane that will fly the style you want and not so much under what power. Just my thought.

Paul