Chinese IMEs - Wubi, Cangjie There is no learn Chinese website so I figured I should ask here. Please let me know if this is not the right place to ask.

I'm learning Chinese and I aim to be able to type fast. I am considering learning one of Wubi or Cangjie (EDIT: or Zhengma now). My ultimate goal is to be able to read and type Mandarin, Cantonese and Japanese. Can I get the pros and cons and comparison of Wubi based on this. (comments on any other input method, if helpful for typing speed are welcome too)

Specifically


Which is "easier" to learn. I'd like to know which one's rules are more intuitive than the other based on some pre-existing associations. 
Which takes less time to learn? One may have simpler rules to decide components but have too large a number compared to ther
Which is faster to type? I'm not talking about the extreme case where that super character with 99 strokes can be typed using only 2 characters in Cangjie and 23 in Wubi or some such. I'd like if the relative frequency of the Chinese characters themselves is considered. I'm looking for a weighted average. 
Which is more versatile. I am given to understand that both Cangjie and Wubi (recent versions) can type both Simplified and Traditional characters. Are there any major differences there? Also, is either good for typing the Kanji characters that Japan uses exclusively (I don't know how many of them there are)?


EDIT: There's also Zhengma which I hear is capable of typing the entire Unihan set. 

Also, Wubi I believe is licensed on Windows so that's not an issue for me.

Mods: this can be seen as a discussion question but I think its a good question that some may like information on and removing it just because only one person will get those 15 points doesn't seem like a good idea to me.
Wubi is indeed very fast, but the cost and benefit makes it less worthwhile. In fact, I'd like to argue most of the professional typewriting systems aren't worth learning. You get AI support on major sound-based IMEs and AI advances a thousand miles a day, soon they will be at least as fast as Wubi and its peers. I'd like to think Wubi is as dead as all those stenotype systems. You shouldn't use them if you want to be some sort of professional.

Also Wubi is a copyrighted system, though the copyright owner, 王江民, reluctantly gave out an earlier version for free (after losing a copyright lawsuit, which is kind of ridiculous because he should have won), the later versions are again copyrighted. No software company takes interest in buying the copyright and develop an IME for it, which means you're stuck with the so-called classic version which only supports a subset of simplified Chinese characters(it can support a bigger charset, but you have to work around a lot of issues, making it less of a choice for traditional Chinese). 王江民 made IMEs with his own company, but apparently he knew neither software nor business. Last time I checked, the company had only 2 part-time employees maintaining the website, nothing else. 

The business is later transferred to 王's daughter-in-law, but she has her own business to take care of. Last year I wrote a tirade on the status of Wubi. She said she will do something about it, but nothing happened since then.

By comparison, the Cangjie inventor had made it to the public domain, and now it has a livelier ecosystem.

In general, Wubi takes less strokes to form a character, but Wubi's rule has more exceptions and therefore more difficult to learn.