Jared,
As I got my coffee and realized the news of the world had not changed I opened up the computer and saw your question. I immediately thought of one not mentioned in your list: WordTracker. I just started using it so jury is out and I still like keywords tool. James Norquay did a nice post on youmoz on advanced keyword research that is worth the read.
Before I wrote a response to your question I was struck by how it was Christmas and I was looking at work. But, it really isn't work to me. (And we do our celebrating on Christmas Eve for any who think I may be a Grinch). So, I started writing about keywords and Christmas. Sorry, I just couldn't help myself.
As the family rises for Christmas,,,much slower than me,
I jump on the moz to see what could be key.
One clients a lawyer, another sells skis,
I just gotta wonder what words will be keys?
To find one a case or the other a sale,
Then my clients smile brighter, and don't send me hate mail.
My PPC group has it easy you see,
Just send them some money as leads they aren't free!
I tell clients slow down, analyze and take heed,
If you slow down a bit - less money you'll need.
I understand well, you just want it now,
but you gave me a field, and it has to get plowed.
It's a field full of holes and rocks, and nothing that matches.
but we'll find a way when an idea catches.
Then you'll call me brilliant, "those records he smashes!!"
But it just took some digging so your money's not ashes.
Then back to the moz, to Shah, to Ryan, to EGOL, and associate's one through thirty three,
Gianluca, Rand, Keri, Alan, Cyrus, don't forget Dr. Pete,
Some I didn't name cause my wife's coming down the stairs,
When she sees me at 'work', it will be stares!
But thanks SEOmozzers for the help small and in batches,
More questions tomorrow about words and matches!!
It so easy for the others, NUMBER ONES GUARANTEED!!
But with me and you Mozzers
Next year's guaranteers, damn well better take HEED!
**Wishing each of you a wonderful, prosperous, New Year. **