There is no "Best Mic." There are choices to make for each situation you will be shooting.
A handheld mic would be appropriate for an ENG type of situation.
A lavaliere is an equally appropriate option.
A hypercardioid on a boom-pole would also be an acceptable choice as long as it is placed properly.
What you need to do is look at your future needs as well. Since you are on a tight budget an Audio Technica AT897 or Rode NTG-2 may be a possible option - they're self powered, so will work with your camera and can be used for other types of projects.
You will need to be extremely careful with the placement. If you are just a little bit off-axis you will be recording what ever is behind you and not your voice. And yes, you DO need the adapter and you DO need the shock mount.
The Rode VideoMic Pro is another option, but limits you more in the future.
As always, my primary suggestion is to hire a pro, next is to hook up with an up-and-coming production sound person and only as a last resort do you DIY.