I could tell you right now what will technically win... Any stacked collinear antenna with as many segments as you can find, which would be the size of something that needs to have an aircraft warning light on top of it, and would probably fail the wife acceptance test in most households. There's probably a "what's the best" post just about every day, but that's the problem... It's kind of like asking, what's the best car. All depends... Do you want to go fast, save gas, go off road. Are you single, or do you have a family. Do you have to pull a boat... There's no one car that will work for everything and everybody. Same thing with radio equipment. Something that works great in one situation may not work well for somebody else. If you travel along a rail line, you'll notice they use different antennas. A design that works well in one spot could be terrible in another. There's a spot on a line near me through the mountains that uses a corner reflector. That's very unusual for rail, but their tech guy must have found a reason for it. It probably works great there, but wouldn't work well at all in other spots.
Dave
http://www.dpdproductions.com
Antennas & Accessories for the RF Professional & Radio Hobbyist