If you Need a 5/8 wave ground plane that has to stand up to brutal winter weather Jay`s I 10-K is built like a brick shit house.
Once you put it together and put it up it is very worry free and you can dump a lot of watt`s into it and never have to think about it.
If you are on a budget, there are other 5/8`s wave ground planes that will function as well, they are just not constructed as well as far as fit and quality of materials used.
If you have the money, it is a great antenna, if you are looking for more gain, then as tony has said, a three or four el yagi will preform much better.
73
Jeff