My son has both Rawlings Pro-Preferred and a Nokona. Different sizes - he uses the Nokona in the OF and the Rawlings for IF. He loves them both and both took quite awhile to break in...I used to do lots of leather work / tooling...both have great leather...We have an old catcher's mitt that both my boys used up until last year that's a Nokona - best mitt I've ever had on my hand...need to get it re-laced, but it put in 6 years of heavy use before one of the laces broke...it was well cared for, just caught one too many hard pitches!
In general I think the A2000 gloves break in more quickly primarily because they're a softer (and probably thinner) leather. My younger son has been using one of them that his brother gave up when he bought the Rawlings. I haven't messed with the TPX gloves, so can't comment on them.
TIMHO, the reality is it comes down to what works best for you. If you're looking at the top level gloves, they'll probably all last several seasons. While I LOVE that Nokona catcher's mitt (and others that I've messed with), I have never been comfortable with their fielders gloves as they just don't seem to feel right on my hand...
Hope that helps!