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A "best" eyepiece question (for any use) is a lot like asking which is better Holden or Ford...the answer is it depends.
It depends on your budget, your interest, your scope and your experience.
Ergonomics and comfort play a big role too.
Long time planet watchers will normally rank the "best" planet watching eyepieces to be those of simple design with little glass (Otho etc.)...these can get mighty high quality and mighty expensive. The view is fabulous however the Field of View is tiny and the Eye Relief is nearly non existent. They work great if you have a tracking mount and don't mind squishing your eye to the lense. But in a hand driven dobsonian mounted reflector they are a lot more work.
I have Pentax (XWs), Teleview (Naglers, Ethos and Panoptics), Denkmeir, and a few TMB Planetary eyepieces...
Are the TMB's strictly speaking "as good as" the others...nope, but they are 96.3% (my estimate) as good. In my scopes it is hard to beat the Pentax XWs (I have the 7 mm and 10 mm)...they are comfortable to use and have a nice field of view. Having said that, for most folks on most nights they would be hard pressed to see a lot of difference between the TMBs and the XWs...
As you gain experience in using eyepieces you will develop some strong preferences for they type of gear that you like...wide fields, eye relief, simple design etc. So it really depends on you as to what the right answer is.
Cheers,
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