I agree with Dr. Kiwi. Pick one connector type and stick with it. Always a good thing. My vote goes for Deans Ultra. Man, if I could eat 'em for breakfast, I would... That's how much I like 'em.

With cheap can motors like the Speed 700, I usually solder the speed control wires directly to the motor. Saves a connector, and is slightly more efficient.

Get yourself a AA alkaline battery out of the TV remote and compare it to the individual cells in that 1600mAh NiMH pack. If they're the same size, the pack won't hold up to 25 Amps, I'm afraid. AA NiMH cells generally have a very high internal resistance, and can't produce lots of current. That GWS pack would work great in a GWS warbird or GWS E-Starter where you'd see at most 10 Amps on a bad day. BTW, has it got a tiny red connector on it? Any of the cells mentioned above will work great.

Any idea what size prop you're going to use? That'll be the big determining factor in how many Amps the motor will draw.