I'm not saying the G4 does have the most throw, but it does have a larger, deeper reflector than the others, so it probably does.
The RC-N3 WW is a very nice light for the price, however, it won't be super bright. I have this one, it is comparable to my Surefire G2 in brightness, which is rated at 65 lumens.
If I had to choose one to buy for your specific use, I would probably go with the Romisen RC-M4 from shining beam, and know that I can purchase a drop-in from Deal Extreme or Kaidomain in the future for added versatility. Or I would get the RC-F4 and mod it with the CREE Q3-5C that shining beam sells since I love 2xCR123A lights and Warm White tint.
I have had a total of 4 Romisen lights, and have never had a problem with any of them, they are very nice lights for what you pay for them. And when you deal with shiningbeam, the service you get is top notch, and the shipping is fast since he is stateside.