I've flown the Thunder Tiger Christen Eagle EP Profile both indoors and out:
This airplane is very quick building and highly aerobatic, but can be slowed down and flown quite gently as well. I flew mine with the included speed 370 brushed motor, which is quite powerful and durable. I used an Electrifly C-12 speed controller and a 3S 640Mah LiPo pack along with a GWS Pico 4 receiver and 3 GWS Pico servos.
The Thunder Tiger Christen Eagle EP Profile is available for $49.99 from the folks at thundertiger4u.com:
http://www.thundertiger4u.com/thunde...le-p-7403.html
Any hobby store that resells Ace or Thunder Tiger should be able to order one right up for you. It's part number TTR4318, and Thunder Tiger offers a complete selection of replacement parts as well.
This is a high quality, inexpensive 3D foamy biplane that can be flown mild or wild with either the stock motor or a brushless upgrade. It's very easy to assemble and flies great.
Good luck and good shopping!